Is it OK to add additional keywords with the meta tag while i use Yoast SEO free plugin?

I was just thinking of that idea but couldn't find any answer on google. Is it possible? Will it crush my current SEO?

submitted by /u/vanedvinson
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from Search Engine Optimization: The Latest SEO News https://www.reddit.com/r/SEO/comments/axijod/is_it_ok_to_add_additional_keywords_with_the_meta/>