A title tag is an HTML element that specifies the title of a web page. Title tags are displayed on search engine results pages (SERPs) as the clickable headline for a given result, and are important for usability, SEO, and social sharing. The title tag of a web page is meant to be an accurate and concise description of a page’s content.
Code sample <head> <title>PowerHoster Forums - Example Title</title> </head>
Optimal title length
Google typically displays the first 50–60 characters of a title tag. If you keep your titles under 60 characters, our research suggests that you can expect about 90% of your titles to display properly. There’s no exact character limit, because characters can vary in width and Google’s display titles max out (currently) at 600 pixels.
WordPress All-in-one SEO plugin says the best length of a title is 62 characters. But I never believe them.
Why are title tags important?
Meta title tags are a major factor in helping search engines understand what your page is about, and they are the first impression many people have of your page. Title tags are used in three key places: (1) search engine results pages (SERPs), (2) web browsers, and (3) social networks.
1. Search engine result pages
Your title tag determines (with a few exceptions) your display title in SERPs, and is a search visitor’s first experience of your site. Even if your site ranks well, a good title can be the make-or-break factor in determining whether or not someone clicks on your link.
2. Web browsers
Your title tag is also displayed at the top of your web browser and acts as a placeholder, especially for people who have many browser tabs open. Unique and easily recognizable titles with important keywords near the front help ensure that people don’t lose track of your content.
3. Social networks
Some external websites — especially social networks — will use your title tag to determine what to display when you share that page.