https://www.w3schools.com/tags/att_meta_name.asp
PHP Code:
<head>
<meta name="description" content="(<HERE>)">
<meta name="keywords" content="">
<meta name="author" content="John Doe">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
These are your *wish list* the keywords tag is not normally used and can be ommitted.
To get used the "description" as to be super relevant to the content and not spammy advertising. Useful information to a searcher's query.
The description snippets can be, and most often are, a sentence on the indexed page that the search engine's algorithm finds relevant to that page.
Actually if you check your description tag and your search snippet used -- the two I checked were in fact used. Tweak your page content to the new long tail keywords you want to aim for and alter your description tag a little at a time until you are happy with the results.
Get the SEO working first -- eye candy design costs money and time
or buy an ad :P