A meta tag is a snippet of text that describes the content of a webpage. Meta tags don’t actually appear on the page itself – but in the background, aka the code. They help tell search engines what that webpage is all about.
Because of this, using meta tags correctly is a fundamental part of Search Engine Optimization (SEO). If you want to rank high in Google searches, make sure you (or whoever maintains your website) is applying meta tags strategically.
Meta tags can be the same for all search engines. However, usage patterns can change. Google may require a maximum of 130 characters for the meta tag, while Yandex may require 160 characters.
You need to know this character limit and create the text you created accordingly. Meta tags should be short and concise. They should be shorter than 10 words and should not repeat the words previously mentioned in the document text.
There are many factors to consider when creating meta tags. The most important thing is to make sure that the meta description and keywords are relevant to the content on your page. You should also avoid using too many keywords as it will only confuse your target audience.
For more information; https://cinema8.com/blog/how-to-create-content-based-on-seo