An H1 is an HTML element used to define the main header or title of a web page. It is a header-level tag that tells the browser and search engines what is the most relevant and featured content on a given page.
From an SEO perspective, proper use of H1 tags is essential for optimizing the content of a web page. Search engines, like Google, use H1 tags to understand what a page is about and determine its relevance to certain queries. Therefore, it is important that the text of the H1 is related to the main keywords that you want to rank in the search results.
H1 text is a crucial element to the user experience, as it helps visitors quickly understand what the page is about and what they can expect to find on it. Additionally, H1 text can also influence click-through rate in search results as it is displayed as the main title in SERPs (search engine results pages), making it a key element for attract the attention of users and increase visibility in the search engine.