Why meta tags still matter
Meta tags are the short pieces of HTML in a page's <head> that tell search engines and social networks what the page is. They are invisible on the page itself, which is exactly why they go wrong without anyone noticing.
The title tag is still one of the strongest on-page signals Google uses, and together with the meta description it is your advert in the search results. A missing noindex or a canonical tag pointing at the wrong page can remove a page from Google entirely, however good the content is.
Recommended lengths
Google truncates by pixel width rather than characters, but these ranges are a reliable guide:
- Title tag: 50–60 characters. Put the most important words first and your brand at the end.
- Meta description: 120–160 characters. Write it as a reason to click, not a list of keywords.
- H1: one per page, matching the topic of the title without needing to be identical.
The canonical tag trap
A canonical tag tells Google which address is the "real" version of a page. It is a common source of silent damage: templates and plugins often set the same canonical on every page, usually the homepage. Google then treats every other page as a duplicate and quietly leaves it out of results.
This checker compares the canonical with the address you entered and warns you if they do not match. Every page you want to rank should normally have a canonical pointing to itself.
Further reading: The Complete Website Audit Checklist for 2026 (40+ Things to Check)