There is an old misconception that there is value in setting <meta>
tags. But if you do any research on SEO these days, you find that the search engine only uses that if there is no other information on the page, if then.
The <title>
tag is set by WordPress to be the page title. You can modify it using a plugin.
You can make a child theme and hard code what you want into the <head>
section, but it is used for every page, not just the home page. I think that’s what most plugins do: add an action for wp_head
and output the excerpt as the <meta>
description. There is a place in the editor to manually add an excerpt for each page. If you don’t the content is used to generate one.