ASO 키워드 리서치 가이드

Every keyword research project starts with a seed list. This is a raw collection of terms that describe your app, your category, and the problems you solve. Do not filter or judge at this stage. You want quantity, and you will narrow down later.

Start with the obvious: what does your app do? Write down every way a potential user might describe it. If you built a meditation app, your seeds might include "meditation," "mindfulness," "sleep sounds," "breathing exercises," "stress relief," "calm," "relax," and "guided meditation." Think about both functional terms (what the app does) and emotional terms (how users feel or what outcome they want).

Next, mine your competitors. Look at the top 10 apps in your category on both the App Store and Google Play. Read their titles, subtitles, and descriptions. Every unique term they use is a potential keyword. Pay special attention to the subtitle (Apple) and short description (Google), since developers place their most important keywords there.

App Store autocomplete is a goldmine. Open the App Store on your phone and start typing your core terms. The suggestions Apple shows are ranked by search volume. Type "meditation a," "meditation b," "meditation c," and note every suggestion. Do the same on Google Play. This technique alone can double your seed list.

User reviews are the most underused keyword source. Read reviews of your app and your competitors. Users naturally describe features and problems in their own language, which is often different from how developers describe them. If users keep writing "I use this to fall asleep," then "fall asleep" is a keyword worth targeting, even if you would never have thought of it yourself.

Aim for 50 to 100 seed keywords before moving to the next step. Organize them in a spreadsheet with columns for the keyword, estimated relevance (high, medium, low), and the source where you found it.

Not all keywords are worth targeting. A keyword with high search volume but extreme competition is nearly impossible to rank for. A keyword with zero search volume wastes your limited character space. You need to find the sweet spot: terms with meaningful volume that you can realistically rank for.

Apple does not publicly share search volume data, but Apple Search Ads provides a "popularity" score from 5 to 100 for any keyword. You can access this through the Search Ads dashboard even without running paid campaigns. Keywords scoring above 40 have significant volume. Keywords between 20 and 40 are moderate. Below 20 is low volume but potentially high intent.

For Google Play, use Google Trends to compare relative interest in your keywords. While Trends does not show absolute volume for app searches specifically, the relative comparison tells you which variations users search more. "Workout tracker" versus "exercise tracker" versus "fitness tracker" can have very different volumes despite meaning roughly the same thing.

Difficulty is about who you are competing against. Search each keyword on the App Store and note the top five results. If those results are all major brands (Nike, Headspace, Calm, Google), that keyword is extremely competitive. If the top results include smaller indie apps with low review counts, the keyword is more accessible.

Create a simple scoring system: assign each keyword a volume score (1-5) and a difficulty score (1-5, where 5 is hardest). Calculate an opportunity score by dividing volume by difficulty. Keywords with the highest opportunity scores are your best targets.

Be realistic about your app's current authority. A new app with zero reviews cannot compete head-to-head with established apps on broad terms. Start by ranking for long-tail keywords (three to four words), build up reviews and download velocity, and gradually move toward more competitive short-tail terms as your authority grows.

Apple gives you a dedicated keyword field of exactly 100 characters. This is separate from your title (30 characters) and subtitle (30 characters). Together, these three fields determine which searches your app appears in. Every character matters, and there are specific formatting rules that maximize your coverage.

First, never repeat words. If your title contains "meditation," do not put "meditation" in your keyword field. Apple already indexes your title and subtitle, so repeating words wastes characters. This is the single most common mistake developers make, and it can cost you 10-15 characters of wasted space.

Separate keywords with commas, not spaces. Apple treats commas as separators and automatically combines individual terms in different orders. If your keywords include "sleep,sounds,white,noise," Apple will match searches for "sleep sounds," "white noise," "sleep noise," and "white sounds." Spaces after commas are wasted characters.

Use singular forms only. Apple automatically matches both singular and plural, so "timer" matches "timers" as well. Writing "timers" wastes one character. Over 100 characters, these single-character savings add up to space for one or two additional keywords.

Avoid prepositions and articles (the, a, an, for, with) unless they are part of a specific brand name or phrase. Apple's algorithm handles these connecting words automatically in most cases.

Do not include your app name or developer name in keywords, as these are already indexed. Also avoid trademarked terms of other apps, which can get your app flagged or removed.

Here is a practical framework for allocating your 100 characters: devote roughly 40 characters to your highest-priority keywords (the ones with the best opportunity scores from Step 2), 30 characters to medium-priority terms, and 30 characters to experimental long-tail terms. During each app update, rotate the experimental terms based on what is and is not ranking.

Google Play works fundamentally differently from the App Store when it comes to keywords. There is no dedicated keyword field. Instead, Google indexes your title (30 characters), short description (80 characters), and full description (4000 characters). Google's algorithm is closer to traditional web SEO, which means keyword placement and natural language matter.

Your title should contain your primary keyword right after your app name. If your app is called "ZenFlow" and your primary keyword is "meditation," your title should be "ZenFlow: Meditation & Mindfulness" rather than "ZenFlow - Your Daily Companion." The keyword in the title carries the strongest ranking signal.

The short description (80 characters) is your second most important field. Include your top two to three keywords here in a natural, readable sentence. "Guided meditation, sleep sounds, and breathing exercises for daily calm" is much better than "meditation app sleep sounds mindfulness breathing calm relax." Google can detect keyword stuffing and may penalize your ranking.

For the full description, think of it as a 4000-character SEO landing page. Include your target keywords naturally throughout the text, aiming for each primary keyword to appear three to five times. Google's NLP capabilities mean that synonyms and related terms also help your ranking. If you mention "meditation" and also use "mindfulness," "relaxation," and "stress reduction," Google understands the topical relevance more broadly.

Structure your description with clear paragraphs focused on different features or benefits. Front-load the most important information, since only the first few lines are visible without tapping "Read more." Include a clear call to action in both the visible portion and the end of the description.

One often-overlooked ranking factor on Google Play is your app's category and tags. Choosing the right primary and secondary category helps Google understand your app's context and show it in relevant browsing sections. Review your category choice annually, as Google periodically adds new categories and subcategories.

Localization is the most underused keyword strategy in ASO. When you localize your keywords for a new market, you are not just translating words. You are unlocking entirely new search queries with far less competition. Most apps never localize beyond their primary language, which means localized markets have significantly lower difficulty scores for equivalent keywords.

Apple allows you to set different keywords for each of the 40+ App Store locales. This means you can target completely different keyword sets for French-speaking users in France, Canada, and Switzerland. Each locale has its own keyword field, title, and subtitle, giving you massive additional keyword coverage.

Do not use Google Translate for keyword localization. Direct translations rarely match how local users actually search. The French word for "to-do list" is "liste de taches," but French App Store users are just as likely to search "todo" or "to do list" in English. Research each market individually using local autocomplete suggestions and competitor analysis.

Some markets offer strategic advantages. Japanese users heavily search in both Japanese characters and English terms. If your app's category has an English loanword commonly used in Japan, target both the katakana version and the English spelling. Similarly, in Korean and Chinese markets, English brand names and category terms often appear alongside native language searches.

Prioritize localization for markets with the highest revenue potential relative to competition. The US and UK are the most competitive English-language markets. Germany, Japan, South Korea, and France often have strong revenue potential with lower keyword competition. Even without translating your entire app, localizing just your metadata (title, subtitle, keywords, description, and screenshots) can increase installs in a new market by 30-80%.

Track keyword performance per locale separately. A keyword that ranks well in the US might not rank at all in the UK App Store, and vice versa. Maintain separate keyword spreadsheets for each locale you target, and update them on the same schedule as your primary market.

Keyword research is not a one-time activity. The app stores are dynamic environments where rankings shift constantly based on new competitors, algorithm updates, and seasonal trends. You need a system for tracking your keyword performance and making data-driven adjustments.

Set up weekly rank tracking for your top 20-30 keywords. You can do this manually by searching each keyword and noting your position, or use tools like AppFollow, Sensor Tower, or App Radar that automate the process. Record the data in a spreadsheet with columns for keyword, current rank, previous rank, and trend direction. Visual charts make it easy to spot keywords that are climbing versus declining.

Review your keyword performance every four to six weeks, ideally aligned with your app update schedule. During each review, identify three categories: keywords where you rank well (top 10) and should maintain, keywords where you are climbing (positions 11-30) and should double down on, and keywords where you are not ranking at all (position 50+) and should consider replacing.

When replacing underperforming keywords, do not swap all of them at once. Change two or three at a time so you can attribute ranking changes to specific keyword additions or removals. If you replace eight keywords simultaneously, you will not know which new terms are working and which are not.

Seasonal patterns affect keyword volume significantly. "Gift ideas" spikes in November and December. "Fitness" and "diet" peak in January. "Tax" surges in March and April. If your app serves seasonal use cases, plan keyword rotations around these cycles. Add seasonal keywords two to three weeks before the peak period and remove them afterward to free up space for your evergreen terms.

Finally, monitor competitor keyword changes. When a competitor updates their title or subtitle, note the changes and consider whether they have discovered a valuable keyword you are missing. Competitor keyword monitoring is a continuous intelligence source that often surfaces terms your initial research did not capture.