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How to Do Keyword Research with Semrush: A Complete Guide
Keyword research is the foundation of any successful SEO strategy. Without understanding what your audience is searching for, you’re essentially shooting in the dark. Whether you’re optimizing an existing website or launching a new one, identifying the right keywords can mean the difference between ranking on page one and getting lost in the results.
While there are dozens of keyword research tools available, Semrush has become one of the most popular choices for good reason. It combines comprehensive data with an intuitive interface that works for beginners and advanced marketers alike. This guide walks you through the entire keyword research process using Semrush, from basic searches to competitive analysis.
Getting Started with Semrush
Before diving into keyword research, you’ll need to set up your Semrush account. The platform offers a free tier with limited functionality and several paid plans depending on your needs.
Setting Up Your Account
Sign up for Semrush and complete the onboarding process. You’ll be asked to add your domain (or any domain you want to analyze). Once added, Semrush begins gathering data about your site’s current rankings, traffic, and backlinks. This baseline information is valuable for tracking your progress over time.
Understanding the Dashboard
The Semrush dashboard displays your domain overview, showing current rankings, organic traffic estimates, and key metrics. Take time to familiarize yourself with the main navigation. The Keyword Research section is typically your starting point for finding new keyword opportunities.
Step-by-Step Keyword Research Process
Step 1: Identify Your Seed Keywords
Start with 5-10 seed keywords—broad terms related to your business or content topic. These are your baseline keywords that you’ll expand upon. For example, if you run a fitness blog, your seeds might include “weight loss exercises,” “home workouts,” and “cardio training.”
Enter your first seed keyword into Semrush’s Keyword Magic Tool. This is where the real research begins. Semrush will generate hundreds of related keywords, organized by search intent and volume.
Step 2: Analyze Keyword Difficulty
Not all keywords are created equal. Some are easy to rank for; others will take months of effort. Semrush displays keyword difficulty (KD) as a percentage—0% meaning extremely easy, 100% meaning nearly impossible.
As a general rule:
- KD 0-30: Good targets if you have a new or low-authority site
- KD 30-50: Moderate difficulty; feasible with solid content and backlinks
- KD 50+: Highly competitive; typically reserved for established websites
Filter your keyword list to focus on difficulty levels appropriate for your site’s authority. This prevents you from chasing keywords you won’t realistically rank for.
Step 3: Evaluate Search Volume and Trends
Semrush shows monthly search volume for each keyword—the average number of searches in the past month. Higher volume sounds good, but volume alone doesn’t guarantee value. A keyword with 1,000 monthly searches and zero commercial intent is worthless for an ecommerce site.
Look for keywords with:
- Sufficient search volume (typically 100+ monthly searches for niche content)
- Positive trend direction (indicated by the trend graph)
- Search intent matching your content goals
Click on individual keywords to see their trend data over the past year. Avoid chasing temporary trends unless that’s your specific strategy.
Step 4: Examine Search Intent
Understanding search intent—why someone is searching for that keyword—is crucial. Semrush categorizes keywords into four intent types:
- Commercial: User is researching before making a purchase decision
- Informational: User wants to learn about a topic
- Navigational: User is trying to reach a specific website
- Transactional: User is ready to complete an action (buy, sign up, etc.)
Match your keywords to your content type. Informational blog posts should target informational keywords. Product pages should target commercial and transactional keywords.
Step 5: Analyze the SERP
For your top keyword candidates, Semrush shows the current search results. Click on any keyword to view the top 10 ranking pages. This reveals:
- What content format dominates (blog posts, product pages, reviews, etc.)
- Content depth and length expectations
- Which sites are ranking and their domain authority
- Opportunities to create better content than current top results
If you see the same five massive sites dominating all results, that keyword might be too competitive. If you see diverse, smaller sites ranking, it’s a better opportunity.
Advanced Features in Semrush
Once you’ve mastered the basics, Semrush offers several advanced features:
Keyword Gaps: Compare your rankings to competitors’ rankings. Semrush instantly shows keywords your competitors rank for that you don’t. This reveals quick wins—keywords you can likely rank for without massive effort.
Keyword Clustering: Group related keywords together to plan content clusters around core topics. This helps you build topic authority and prevents keyword cannibalization.
SERP Features: Semrush shows which featured snippets, knowledge panels, and other SERP features appear for each keyword. Targeting keywords with featured snippets can boost visibility and click-through rates.
Pros and Cons of Using Semrush for Keyword Research
Pros
- Comprehensive database with millions of keywords across dozens of languages and countries
- Excellent user interface that’s intuitive even for beginners
- Accurate difficulty and volume metrics powered by real search data
- Competitive analysis features help you understand your market landscape
- Regularly updated data ensures you’re working with current information
Cons
- Higher price point compared to some competitors
- Free tier is limited; you need a paid plan for serious keyword research
- Learning curve for advanced features like API integration
- Volume and difficulty metrics are estimates, not exact numbers
The Verdict
Semrush is an excellent investment for anyone serious about SEO. The keyword research functionality alone justifies the cost, and when you factor in the competitive analysis, rank tracking, and content optimization features, it’s genuinely one of the best all-in-one SEO platforms available. It won’t do the work for you, but it gives you the insights needed to make informed decisions and execute a winning keyword strategy.
If you’re ready to start your own keyword research journey, try Semrush today. New subscribers get access to all the tools you need to dominate keyword research. With $200 in rewards for each new qualifying subscription, it’s an excellent time to get started.