Meta tags which we enter in every post.related to post.What do you mean by 'more tags'? What meta tags are we talking about here?
The basic ones are title and meta description. Those are essential. There are a load of others that you can use, but I've yet to see evidence to suggest that using a load of other meta tags has a positive impact on your overall SEO.
I almost feel as though you're confusing meta tags with just the meta keywords tag and are asking whether cramming multiple keywords in the meta keywords tag is a good idea (it's not). I could be mistaken.
<meta name="keywords" content="buy butter churn, cheap butter churns, best butter churn, where can i buy butter churns online">