Meta tagging is an essential aspect of search engine optimization (SEO) that provides information about a web page's content to search engines, helping them index and understand the page's relevance. The most important meta tags include title tag, meta description tag, robots meta tag, canonical tag, and hreflang tag. Optimizing these tags can significantly benefit a website's performance, rankings, traffic, and sales. By using and optimizing specific meta tags, developers can directly improve search engine rankings, affect click-through rate (CTR), and tell search engines which version of a page to index, among other benefits.