Meta tags constitute an indispensable part of SEO campaigns. They are an important aspect of On-page SEO and define the heading structure. These HTML headings denote the importance of the various sections of the content and the ways in which they are interrelated.
H1 is the headline for your post or article. H2 is the sub-headings of the content. Title tags are viewable in the SERPs. Rel tags are inserted into your HTML header and help the search engines to understand the relationship between the different contents on your website.