Content revised 21 October 2026.
On-page SEO mistakes often involve a mismatch between the page’s purpose, its visible answer and its technical instructions. Start with the rendered page rather than a keyword-density target.
Check the expectation set in search
The title and description should explain the actual page. Avoid duplicated titles that make different services hard to distinguish or a summary that promises a price or result the visitor can't find. Search display can vary, so keep the visible heading and answer consistent too.
Read the explanation
Does the page answer the customer’s main questions, or repeat the same service phrase? Keep relevant terminology and replace filler with scope, process or a meaningful example. More mentions are not a substitute for a better answer.
Inspect the implementation
- Check the public canonical and robots instructions.
- Confirm important text and links are accessible.
- Review useful image alternatives in context.
- Avoid duplicate metadata from multiple components.
Check the next step on a phone
Follow a relevant link, open the menu and review form labels and errors in a safe test. An accurate article can still leave visitors stuck if the interface hides the contact route or a control fails.
Write a repair list
Record the affected URL, observed fault, responsible component and verification method. Keep the original source before substantial edits. Fixing a demonstrated problem is more useful than changing every page to satisfy an unexplained score or percentage.
Official guidance: Google’s on-page foundations.