The keyword meta tag used to be relevant for SEO in the early days of search engines, but it has lost its relevance over time. Today, search engines like Google do not consider the keyword meta tag as a major ranking factor.
The reason for this is that many websites used to stuff this tag with irrelevant keywords in an attempt to manipulate search engine rankings. As a result, search engines now rely on more sophisticated algorithms to determine a website's relevance and authority.
While it's not necessary to include a keyword meta tag on your website, it's still a good idea to conduct keyword research and use relevant keywords throughout your website's content, titles, and meta descriptions. This can help search engines understand the content of your website and rank it higher for relevant search queries.