Headings or H tags play a great role in organizing content on a webpage and for giving a clear content structure. They have an impact on both the Search Engine Optimization (SEO) and usability of the web pages because the search engines use these headings to index the content structure of web pages.
Heading tags range from 1-6 and have a varying degree of importance. The elements are H1, H2, H3, H4, H5, and H6 with H1 being the highest (or most important) level and H6 the least. They are found in the source code of an HTML document, defining the headings of a webpage. See image below for better clarity on the use of heading tags;
It doesn’t end with the implementation and structuring your webpage content with heading tags, it goes beyond that. Heading tags need to be well optimised and by that, I mean that they need to be readable, have a natural tone and relevant to the user. They also need to be unique, reflect the topic that page covers and contain a primary keyword.
Bear in mind that user-friendly heading tags can improve overall visibility on search engines, think user-first because search engine like Google puts the user first.