A title tag is the main text that describes your page. The title tag of your page is one of the most important on-page SEO elements as it appears in three key places: browsers, search engine results pages, and external websites.
Title tags show up in the top of a browser’s tabs next to your favicon.
2. Search Engine Results Pages
When you use keywords in the title tag, search engines will highlight them in the search results if a user has performed a query including those keywords. This gives the user greater visibility and generally means you’ll get a higher click-through rate.
3. Social Media and External Websites
Many websites, including Facebook and Twitter, will use the title tag of a web page as its link anchor text when it displays the content from your website.