A title tag is the HTML element in the head of a page that gives that page its name. Search engines use it as one of the strongest clues to what the page is about, and Google usually shows it as the blue clickable headline in its results.
How a title tag works
In the code it is a single line inside the page head, with the text written between an opening and closing title element, for example “Emergency Plumber in Croydon | Smith & Sons”. Visitors see it in the browser tab and when they bookmark or share a page. Most CMSs, including WordPress with an SEO plugin, Shopify and Squarespace, let you set it in a field labelled “SEO title” or “page title” without touching code.
Google calls the headline it displays the “title link”. It builds this mostly from your title tag, but it can also draw on the H1, other headings, anchor text from links, or text on the page. It tends to rewrite titles that are very long, stuffed with keywords, identical across many pages, or that do not match the content. There is no fixed character limit; Google truncates by pixel width, so around 50 to 60 characters is a sensible working range for the full title to show on most screens.
Why it matters
The title does two jobs at once. It helps Google match the page to a search, and it is the first thing a searcher reads when deciding which result to click on the search results page. A vague title such as “Services” wastes both. A specific one such as “Boiler Servicing in Leeds | Gas Safe Registered Engineers” tells the searcher what they will get and where, before they have seen the site.
A better title can lift click-through rate without any change in ranking position, which makes it one of the cheapest improvements on a site. For UK local businesses, including the town or area in the title of a location page is often the clearest way to show relevance to a nearby searcher.
Common mistakes
- The same title on many pages. Templates that output “Home | Company Name” everywhere tell Google nothing and invite rewrites.
- Two pages targeting one term. If two titles chase the same phrase, the pages compete with each other, which is keyword cannibalisation.
- Keyword lists. “Plumber London, Plumbers London, Best Plumber London” reads as spam and gets rewritten.
- Brand first on every page. On pages where the brand is not what people search for, lead with the topic and put the brand at the end.
- Promising what the page does not deliver. A title offering prices on a page with no prices gets clicks that bounce straight back.
How to act on it
Export your titles from a crawler or your SEO plugin and read them as a list. Each should be unique, name the main topic early, and give a reason to choose this result: a location, a price, a format or a clear benefit. Write for the person searching, not for an algorithm.
Test drafts in the title tag and meta description checker to see how they will display, then watch click-through rate in Search Console over the following weeks. Rewriting titles and headings across a site against a keyword map is a core part of on-page SEO.