How to Use Semrush for Keyword Research Step by Step

Keyword research determines whether your content gets found or ignored. Semrush packs several tools for this, but most people only scratch the surface. Here’s how to actually use Semrush for keyword research, step by step, without wasting hours.

Start with Keyword Overview: Check the Obvious First

Before you build a giant list, test your seed keyword. Type it into Semrush’s Keyword Overview. You’ll instantly see monthly search volume, keyword difficulty, search intent, and the current top-ranking pages.

Don’t skip this. If your seed keyword has extremely high difficulty and you have a new site, you’ll need to pivot. If the intent is transactional but you planned an informational article, you’ll waste effort. Keyword Overview tells you this in five seconds.

Look at the SERP Analysis section. Are the top results massive brands, or smaller niche sites? If it’s all giants, you might need a longer-tail angle. If smaller sites rank, you have a realistic shot.

Use Keyword Magic Tool to Expand Your List

Keyword Magic Tool is where the real research happens. Enter your seed keyword, choose your target country, and you’ll get thousands of related keywords. The default view shows broad match, but you can switch to phrase match, exact match, or related.

Here’s a practical workflow:

1. Filter by volume — Set a minimum search volume, say 100 or 300, depending on your site’s authority.
2. Filter by difficulty — For newer sites, keep KD below 30. For established sites, you can go higher.
3. Filter by intent — If you want to write blog posts, select Informational and Commercial. If you sell something, focus on Transactional.
4. Scan the questions — Click the Questions tab to find long-tail queries people actually type.

A common pitfall is exporting 5,000 keywords and then feeling overwhelmed. Don’t do that. Apply filters aggressively until you have 50–100 highly relevant terms. That’s plenty to work with.

How to Use Keyword Difficulty the Right Way

Semrush’s Keyword Difficulty (KD) score is not gospel. It’s a relative measure based on the authority of ranking pages. A keyword with KD 45 might be easy for a site with domain authority 60, but impossible for a new blog.

In practice, compare KD to your own site’s authority. If your domain authority is under 20, target keywords with KD under 25. As you build links and content, you can go after more competitive terms. Don’t chase a KD 70 keyword if you’ve never ranked for anything.

Analyze Competitors with Organic Research

Your competitors have already done keyword research, whether they know it or not. Organic Research lets you see every keyword a competing domain ranks for.

Enter a competitor’s URL. Look at their top pages and the keywords driving traffic to those pages. You’ll often find terms you never thought of. Export the list, then filter for keywords that are relevant to your business and have a difficulty you can handle.

This is one of the fastest ways to build a content plan. Instead of guessing what people search for, you see exactly what is already working for similar sites.

Find Gaps with Keyword Gap Tool

Keyword Gap compares your domain against up to four competitors. The tool shows keywords that your competitors rank for but you don’t.

Here’s how to use it effectively:

• Enter your domain and two or three direct competitors.
• Look at the “Missing” tab — these are keywords where all competitors rank but you don’t.
• Filter by volume and difficulty.
• Export the best opportunities and assign them to specific pages or new content ideas.

This is especially powerful for finding quick wins. If you already have a similar page that just needs optimization, you can often rank faster than creating something brand new.

Prioritize Keywords by Intent and Business Value

Not all keywords are equal. Semrush shows search intent for every keyword: informational, navigational, commercial, or transactional. Align your content type with the intent.

For example, “what is project management software” is informational — create a blog post. “best project management software” is commercial — create a comparison guide. “buy project management software” is transactional — create a product or pricing page.

You can also assign a business value score to each keyword. A keyword that directly leads to a sale is worth more than one that just brings traffic. Use Semrush’s filters and your own judgment to rank your final list.

Build a Realistic Content Plan from Your Research

Once you have a list of 50–150 vetted keywords, group them into topic clusters. Each cluster becomes a pillar page plus supporting articles. For example, if you sell email marketing software, you might have a cluster around “email automation” with sub-topics like “best email automation tools” and “how to set up email automation.”

Map each keyword to a specific URL. If you don’t have a page yet, note the content type and target word count. This turns your keyword research into an actionable editorial calendar.

A common mistake is treating keyword research as a one-time task. Revisit it monthly. Search trends change, competitors shift, and you’ll find new opportunities in Semrush’s data.

Use Keyword Clusters to Dominate a Topic, Not Just a Term

Single keyword targeting is outdated. Search engines now understand related terms and user intent across a topic. Semrush helps you build clusters: a central pillar page that broadly covers a theme, and several supporting pages that dive into specific subtopics. This structure signals authority to Google because you cover the conversation comprehensively.

Start by picking a core keyword, like “email marketing.” In Keyword Magic Tool, scan the results for modifiers and related concepts: “email marketing automation,” “email marketing for small business,” “email marketing examples,” and so on. Group them by meaning, not just by exact phrase. Then create a pillar page that explains email marketing generally, linking to individual articles for each subtopic. Internal links between these pages reinforce the cluster. Over time, you build a topical map that ranks for dozens of related keywords instead of fighting for a single high-difficulty term.

Track Your Keywords and Adjust Based on Real Performance

Research is only the first step. After you publish content, Semrush’s Position Tracking tool shows you where your pages rank for specific keywords over time. Set up a project, add your target keywords, and check weekly or monthly. Don’t just watch the numbers — act on them. If a page ranks on page two for a valuable keyword, update the content, improve internal links, or build a few relevant backlinks.

Pay attention to keywords that hover just below the top positions. These are often quick opportunities. A small tweak to the title tag or adding a FAQ section can push you onto page one. Conversely, if a keyword consistently underperforms despite your efforts, reconsider whether the intent matches your page. Maybe the page solves a different problem than the searcher has. Adjust your content or redirect your energy to keywords where you have a realistic chance.

Semrush Keyword Research vs Other Tools

Feature	Semrush	Ahrefs	Moz Pro
Keyword database size	Large, multi-country	Large, multi-country	Moderate
Keyword difficulty score	Yes, relative scale	Yes, relative scale	Yes, relative scale
Competitor keyword gap	Yes	Yes	Yes
SERP feature tracking	Extensive	Extensive	Limited
Pricing for entry tier	Higher	Higher	Lower

Semrush stands out for its all-in-one suite. You get keyword research, competitor analysis, rank tracking, and site auditing in one place. That convenience comes at a higher price than some alternatives, but for many users it replaces two or three separate tools.

Common Mistakes to Avoid in Semrush Keyword Research

Even experienced marketers misuse Semrush. Here are the most frequent pitfalls and how to avoid them:

• Ignoring search intent — A keyword with high volume but mismatched intent wastes your content budget. Always check intent before creating a page.
• Over-filtering too early — Start broad, then narrow down. If you filter by difficulty and volume before understanding the topic, you might miss valuable long-tail angles.
• Copying competitors blindly — What works for a competitor with 10 times your authority may not work for you. Adjust difficulty thresholds to your own site.
• Forgetting to localize — If you serve a specific region, set the correct country database in Semrush. Global volume numbers can mislead you.
• Not revisiting rankings — Keyword positions change. Re-run your reports periodically and update underperforming content.

Fix these habits and your keyword research will produce a steady stream of content ideas that actually rank.

Frequently asked questions

Is Semrush good for keyword research?

Yes, Semrush is widely considered one of the best keyword research tools available. It offers a massive keyword database, accurate difficulty scores, competitor analysis, and filtering options that make it easy to find valuable keywords for any niche.

How do I find low-competition keywords in Semrush?

Use the Keyword Magic Tool, set a maximum Keyword Difficulty filter (for example, under 30), add a minimum search volume, and then sort by difficulty ascending. You can also use the Questions filter to find long-tail queries that often have lower competition.

What is a good Keyword Difficulty score in Semrush?

A good score depends on your site’s authority. For a new site, aim for keywords with a difficulty below 25. For established sites with strong backlinks, you can target keywords with difficulty up to 50 or higher. Always compare the score to your own domain’s authority.

Can I do keyword research for free with Semrush?

Semrush offers a limited free plan that allows a small number of searches per day. You can use Keyword Overview and a limited number of Keyword Magic Tool results for free, but for in-depth research you’ll need a paid subscription.

How often should I do keyword research with Semrush?

Most SEO professionals revisit keyword research at least once a month. Search trends, seasonal demand, and competitor activity change frequently. Reviewing your keyword list monthly helps you discover new opportunities and adjust your content strategy.