A title tag is an HTML element that specifies the title of a web page. It appears in the browser tab and is often used as the clickable headline in search engine results. Title tags play a crucial role in both user experience and search engine optimization (SEO), as they help search engines understand the content of a page and encourage users to click through to the site. Ideally, a title tag should be concise, accurately describe the page s content, and include relevant keywords without overstuffing.