Related to Wordpress Website-SEO

1 - How can we better optimize the meta details of a Wordpress website?
2 - Do we need Yoast SEO plugins?
3 - I found my blog - catogory archive page, missing meta description.
On examining the meta templates, I could not find the archive keyword as %% representations.
Is there any tools, so that I can test the meta details?

Thanks

Your answers are as follows:-

1 - How can we better optimize the meta details of a Wordpress website?
-Through Keyword Analysis & Research with the help of Google Adword tool.
2 - Do we need Yoast SEO plugins?
-Not necessary, you can use All in one SEO Pack, freely available for use.
3 - I found my blog - catogory archive page, missing meta description.
-That's the theme bug, you must change your theme.

SEO by yoast and all in one seo plugin are the best seo plugin of the wordpress and the thing is that this is free plugin.