An explanation of the title tag
The title tag is a small piece of text that should be present on every website page to tell the user, and search engines, what the page is about.
In browsers, it's displayed to the user in the browser window (rather than in the actual website).
The screenshot below shows the title tag for JDSports.co.uk displayed in the browser window (whilst using Safari).
The title tag is also used by search engines when they display your website in their search results (as shown in the screenshot below).
Although depending on the search term entered by the user, a different title tag may be displayed to the user for the same page.
Importance of the title tag
The main importance of the title tag is in relation to its appearance in search engines.
There's no use in having a website that appears high in search engine rankings if nobody clicks on the website in the results. Your title tag appears prominently in results so is important in assisting you to get more click throughs.
Tips for a good title tag
• Write the title tag for humans to read
• Place your chosen keywords/keyphrases at the start of the title
• Title tags must be unique for each page
• Don't stuff with keywords
The full article can be found at https://support.google.com/webmasters/answer/35624?hl=en, but here's the highlights
• Should be descriptive and concise
• Avoid repeated titles, used on multiple pages
• Brand your titles with your company name
When you save a new title tag for a website page, search engines like Google will not update your site's listing immediately. You will need to wait until the page updated is next crawled by the search engine for your listing to update. This can take between 2 days and 2 weeks.