03 / Cloud suite
Semrush is a cloud-based marketing platform that combines keyword research, competitor analysis, rank tracking, backlink data, content tools, and a Site Audit crawler. For technical SEO, its value is having audit data next to keyword and traffic data in one place.
This lesson focuses on how Semrush Site Audit works, which other modules support audits, and where a cloud suite fits compared with a dedicated crawler.
1. What Semrush is
Semrush runs in the browser. Users create projects for each domain and use tools such as Site Audit, Position Tracking, Keyword Magic Tool, Domain Overview, Backlink Analytics, and On Page SEO Checker. Plans set limits on projects, pages crawled per month, and tracked keywords.
SEO tools update plans, limits, and features frequently. This lesson focuses on how each tool works and where it fits in an audit workflow. Check the vendor's website for current pricing and plan limits before choosing.
2. Semrush Site Audit
| Aspect | How it works |
|---|---|
| Crawling | Cloud crawler with configurable user agent, limits, and JavaScript rendering on supported plans |
| Issue categories | Errors, warnings, and notices across crawlability, HTTPS, internal linking, performance, and markup |
| Site Health score | A percentage summary based on the share of pages without errors and warnings |
| Thematic reports | Grouped views such as crawlability, Core Web Vitals, internal linking, and international SEO |
| Scheduling | Recurring audits with email alerts |
| Integrations | Google Search Console, Google Analytics, and task tools |
A high Site Health score does not guarantee rankings, and a lower score may include accepted exceptions. Use the score to track direction, and use verified findings to decide work.
3. Research modules that support audits
Keyword research
Find the queries each page should target when rewriting titles and content.
Position Tracking
Monitor rankings before and after technical fixes.
Organic Research
See which pages and keywords drive estimated traffic, useful for weighting fixes.
Backlink Analytics
Identify broken or redirected pages with external links.
AI visibility features
Newer tools estimate brand presence in AI answers. Check current availability.
4. Using Semrush in an audit
- Create a projectSet the domain and configure Site Audit crawl limits.
- Run Site AuditReview errors first, then warnings.
- Add traffic contextUse Organic Research and Search Console to weight affected pages.
- Track rankingsSet Position Tracking for key pages before shipping fixes.
- Recrawl and compareUse scheduled audits to confirm progress.
5. Strengths
All in one
Audit, keywords, competitors, and backlinks in one platform.
Cloud based
No local hardware limits and easy team access.
Competitor data
Estimated traffic and keywords for any domain.
Reporting
Built-in dashboards and scheduled reports.
6. Limits to consider
Crawl limits
Pages per audit and per month depend on plan.
Less configurable crawling
Fewer advanced options than dedicated desktop crawlers.
Estimated data
Traffic and keyword numbers are modelled estimates, not your analytics.
Cost
The broad feature set is priced as a suite.
7. Comparing with other tools
See Screaming Frog vs Semrush vs SiteAuditLint and Screaming Frog vs SE Ranking vs SiteAuditLint for other cloud options.
8. Practical exercise: Combine audit and traffic data
Semrush checklist
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Key takeaways
- Semrush is a cloud marketing suite with a Site Audit crawler.
- Site Audit groups issues into errors, warnings, and notices with a Site Health score.
- Keyword, traffic, and backlink modules help prioritize technical fixes.
- Crawl depth and configuration depend on plan and are less flexible than desktop crawlers.
- Traffic data is estimated, so confirm with your own analytics.
Knowledge check
Next, see a platform known for its backlink index in the Ahrefs lesson.