You can think of the title tag as the title of a non-fiction book. Just like the title of a non-fiction book you want it to tell people what the book is about, and you want to entice people to pick up the book and read it.
Technically speaking, the title tag of a web page is the bit of code that creates the page title. The title tag is essentially the name of a website page that will be visible to visitors and search engines.
For example, here's what the title tag for the article Increase Site Traffic with Title Tags looks like:
- <title> Increase Site Traffic with Title Tags - AboutUs Wiki Page </title>
Title tags are important for SEO, or search engine optimization. The text in a web page's title tag is used by search engines as the link to the page in search results (pictured at right).
The title tag is also visible at the top of the web browser and web browser tabs when you're on a web page, so it helps orient people and make it easier for them to find your site again if they have lots of tabs or windows open.
Additionally, the title tag is often used when people share a link to a web page on a social site like Facebook or Google+. Pictured at right is how Facebook posts look when you share a link to a website - pulling in the web page's title tag and an image from the page.
For more information about the importance of title tags, read Increase Site Traffic with Title Tags.
For tips on creating great title tags and avoiding common mistakes, read 9 Title Tag Mistakes and How To Avoid Them.