What is meta keywords ?, is it important ? how to use it ?

Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is. The most important thing to keep in mind when selecting or optimizing your meta keywords is to be sure that each keyword accurately reflects the content of your pages.

Meta descriptions are not used by Google either has a ranking factor per se, when writing your meta description having the keyword only makes it appears in bold when the user searches it, but this only influences the CTR on SERPs. CTR on SERPs is a minor ranking factor, and if you want to make the best out of it, you should think about your meta descriptions as if they were Adwords descriptions. A good tip is to check a big e-commerce website Adwords campaigns (they generally run a lot of tests to optimise CTR) and get inspiration from there.

Use meta tag and you can add meta title, meta description and meta keyword in this tag.

Meta keywords are no longer important to google.

Meta Keywords are a particular kind of meta label that show up in the HTML code of a Web page and enable advise to web crawlers what the point of the page is. The most essential thing to remember while choosing or streamlining your meta keyword is to make sure that every watchword precisely mirrors the substance of your pages.

Meta tags are snippets of text that describe a page's content; the meta tags don't appear on the page itself, but only in the page's code. We all know tags from blog culture, and meta tags are more or less the same thing, little content descriptors that help tell search engines what a web page is about.

The <meta> tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. Meta elements are typically used to specify page description, keywords, author of the document, last modified, and other metadata.

In the event that an internet searcher arachnid finds similar words on your site and in your meta labels, these words will be positioned higher in the pursuit list.

Meta keywords are no longer used by Google or Bing to determine a site's ranking, so don't overthink meta keywords. Smaller search engines still might use them in their algorithm, so we recommend adding them anyway.
The meta keywords should be the same as the tags you're using in the article. The image below shows that I'm using the article's tags as its meta keywords.

Meta Keywords are a special type of meta tag that appear in the HTML of a Web page and help search engines what the topic of the page is.