What does the web site SEO do?

how to correctly convert SEO if you want google and other major search engines to find
?
I do have some basic hints

<meta charset="UTF-8">
<meta name="robots" content="index, follow">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=0,minimum-scale=1.0,maximum-scale=1.0" />
<link rel="apple-touch-icon" href="<?=$host_url;?>/images/.png"/>

<meta name="keywords" content="<?=$keywords;?>" />
<meta name="description" content="<?=$description;?>" />
<meta property="og:description" content="<?=$description;?>" />
<meta property="og:type" content="website" />
<meta name="twitter:description" content="<?=$description;?>" />
<meta property="og:title" content="<?=$websiteTitle;?>" />
<meta property="og:url" content="<?=$host_url."".$nowUri;?>" />
<meta property="og:image" content="<?=$host_url."/"."images/.png";?>" />
<meta property="og:image:alt" content="<?=$websiteTitle;?>" />

above I would like to put more like this
I don"t know what else is missing?
or something else needs to be added.
just like in codeshelper, it won"t be long before you can find it on Google

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Mar.21,2021

about SEO is a very important topic. Let's not consider SEO, sending questions in codeshelper as the landlord said. We will soon be able to search in Google. This belongs to the collection. Codeshelper website has high weight, strict publishing problems and high originality. If it is a new station, it will be slower.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bde973-397c9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bde973-397c9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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