Find & Fix Website SEO Errors With Semrush On Page SEO Checker

Last Updated Date: November 27, 2025

TLDR:

  • Semrush On Page SEO Checker lets you bulk-audit target keywords/pages and surfaces categorized ideas (strategy, content, technical, SERP, semantic, backlinks) with potential traffic gains.
  • You set up a project, choose country, device, crawl agent, import keywords (Semrush data, Search Console, or CSV), then run “Collect ideas” to generate optimization suggestions.
  • The tool highlights content and readability issues, semantic gaps, and structured data/markup opportunities, plus shows Top 10 Benchmarking so you can align with high-ranking competitors.
  • Optimization Ideas and Idea Tasks help you prioritize high-impact URLs, turn suggestions into trackable to‑dos, and continuously refine what to fix next as new data comes in.
  • Acting on these ideas updates current vs potential traffic estimates and helps you focus on changes most likely to improve rankings and organic traffic.

I use the Semrush On Page SEO Checker to find & fix website SEO errors with Semrush On Page SEO Checker because it gives clear, actionable guidance for each target keyword and page. I set up a project, bring in target keywords, and let the tool run a bulk check so I can prioritize what to fix first.

Table of Contents

How do I set up the Semrush On Page SEO Checker for my site?

To get started I create a project in Semrush, then open On Page and Tech SEO > On Page SEO Checker. From there I click setup and choose a target country or region. I select the device I want to evaluate and pick a crawl user agent—Semrush bot or Googlebot. I choose a schedule (weekly, once, or never) depending on how often I want fresh suggestions.

SEMrush On Page SEO Checker interface with magnified 'Set up' button ready to click
I click the ‘Set up’ button to begin configuring the On Page SEO Checker for my project.

How do I import keywords and run a bulk on-page audit?

Semrush will automatically try to import keywords from multiple sources like Organic Research, Position Tracking, or Google Search Console. I can also add keywords manually or import a CSV. Once I click Collect ideas, Semrush starts analyzing every target keyword in bulk and shows progress as it crawls pages.

On Page SEO Checker progress bar with magnified text 'Analyzing pages: 4 left' while collecting data.
Semrush analyzing pages during the bulk run — progress shows ‘Analyzing pages: 4 left’.

What does the On Page SEO Checker report include and how do I read it?

The report is grouped into clear categories. The Basic Overview gives a snapshot of current traffic and potential traffic if I act on the ideas. The page also lists the number of strategy ideas, backlink ideas, technical ideas, SERP feature ideas, semantic ideas, and content ideas. Hovering over any suggestion shows a short explanation of what the idea means so I know why Semrush recommends it.

SEMrush On Page SEO Checker overview showing content ideas (18) and other idea categories with potential traffic bars
I’m looking at the idea breakdown — Content Ideas and other categories are highlighted so I can prioritize fixes.

How do I use Optimization Ideas to prioritize fixes?

Under Optimization Ideas I see my top priority URLs with potential traffic estimates. For each priority URL I can click into the number of ideas—these are grouped by category. For example, a SERP idea might tell me to mark up my aggregate rating because top-ranking rivals use it. Semrush explains the why and the difficulty so I can decide whether to implement it myself, search for implementation guides, or hire a developer.

SEMrush On Page SEO Checker idea detail showing 'Mark up aggregate rating' recommendation and difficulty label
A SERP idea instructing to ‘Mark up aggregate rating’ shown after opening a page’s ideas.

What content and readability issues will Semrush identify?

Semrush points out content issues like keyword stuffing in body tags, low content length compared to rivals, and poor readability. It tells me what rivals do differently, such as longer content or simpler language, and recommends concrete steps: avoid stuffing, create more informative content, and improve readability. I can click See detailed to view a side-by-side analysis of my page versus top-10 competitors.

SEMrush On Page SEO Checker highlighting the suggestion 'Avoid stuffing in <body> tag' with magnifier over the message
Semrush flags ‘Avoid stuffing in tag’ — I check the detailed analysis to compare my page with top rivals.

Semantic ideas tell me which related keywords and concepts I should add to enrich my page content. Backlink ideas point out sources where competitors earn links; these become outreach targets. I treat semantic suggestions as content expansion opportunities and backlink ideas as places to earn authority that help improve rankings.

SEMrush On Page SEO Checker showing 'Use target keywords in <body> tag' suggestion with keyword chips highlighted
Semantic ideas: target keyword chips and a suggestion to add keywords to the page .

How does Top 10 Benchmarking help me compete for a keyword?

Top 10 Benchmarking shows how the top-ranking pages perform across metrics like traffic, referring domains, use of video, keyword usage, ordered lists, markup, and readability. For example, if a target keyword has 3.6K volume and the top 10 average traffic is 290, I can see where my page stands and which elements I’m missing. This benchmarking helps me match the on-page signals that search engines reward.

SEMrush On Page SEO Checker showing the 'Top 10 Benchmarking' tab and left navigation — ready to load benchmark metrics
I open the Top 10 Benchmarking tab to compare how top pages perform across key on‑page metrics.

How do Idea Tasks make implementation easier?

Idea Tasks turn optimization suggestions into actionable to-dos. When Semrush recommends enriching page content or fixing a markup, it creates tasks I can assign and track. As Semrush collects more data, these tasks get refined so I always work on the highest-impact items first.

What practical workflow do I follow to fix website SEO errors with Semrush?

  • Set up the project: choose country, device, and crawl agent.
  • Import keywords: use Organic Research, Position Tracking, Search Console, or CSV.
  • Collect ideas: run the bulk analysis and review the Basic Overview.
  • Prioritize Optimization Ideas: address high-potential URLs first.
  • Fix content & readability: avoid stuffing, expand content, simplify language.
  • Implement semantic and markup improvements: add related keywords and structured data like aggregate rating.
  • Pursue backlink opportunities: target sources where competitors get links.
  • Create Idea Tasks: assign and track the work until completion.

When I act on Semrush recommendations, the Basic Overview updates my current traffic and potential traffic. The tool estimates how much additional traffic I could gain, highlights top priority pages, and continuously refines ideas as it collects new data. That helps me focus on changes that move the needle instead of guessing.

Frequently asked questions

Do I need to connect Google Analytics and Search Console to get the best ideas?

Connecting Google Analytics and Search Console gives better user experience and URL-level keyword data, which improves the quality of the recommendations but Semrush can still generate ideas without them.

How often should I schedule the On Page SEO Checker to run?

It depends on how frequently you update content or publish new pages. Weekly is a good cadence for active sites; once or monthly can work for quieter sites.

Will implementing all Semrush suggestions guarantee higher rankings?

Implementing suggestions improves on-page factors and increases your chances, but rankings also depend on competition, backlinks, technical health, and search intent. Use Semrush as part of a broader SEO strategy.

Can I export the optimization ideas or tasks?

Yes, you can export lists and use the Idea Tasks to track work. Export options depend on your Semrush subscription and the project settings.

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Senior Digital Marketing Manager BSF, SEO Expert & Teacher

Alston Antony is a Senior Digital Marketing Manager and SEO Expert with more than 15 years of experience helping businesses turn SEO into a predictable customer acquisition system. He holds an MSc in Software Engineering (Distinction) from the University of Greenwich and is a Professional Member of the British Computer Society (MBCS). As a practicing Digital Marketing Manager at BSF, Alston applies the same SEO strategies he teaches to real businesses, validating them in the field before sharing them publicly. More than 7,000 professionals follow him through his private community. He runs a YouTube channel with over 4,000 subscribers and has taught more than 20,000 students on Udemy. Alston created the BARS SEO System, which doesn’t just teach SEO theory. He engineers SEO systems that bring customers.

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