I just put the link of my facebook account on the site. I did an SEO analysis from a free SEO site and it said I need to add Facebook Open Graph. And I add this:
<meta property="og:url" content="https://www.facebook.com/censored:)/">
in the comment, you tell me, what other meta tags are there? .
so here are the SEO tags I find for now
all here in this github repo or in the code below
you don't need to use all, do a mini-research, heres good point of start
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Primary Meta Tags -->
<title>Laaouatni — HTML and CSS Project.</title>
<meta name="title" content="Laaouatni — HTML and CSS Project.">
<meta name="description" content="progetto HTML e CSS di Laaouatni Anas. codice su Github e Codepen (100% responsive)">
<!-- css links -->
<link rel="stylesheet" type="text/css" href="./index.css">
<!-- Open Graph / Facebook -->
<meta property="og:type" content="website">
<meta property="og:url" content="https://laaouatni.github.io/">
<meta property="og:title" content="Laaouatni - Technical Documentation Project.">
<meta property="og:description" content="progetto HTML e CSS di Laaouatni Anas. codice su Github e Codepen (100% responsive)">
<meta property="og:image" content="https://avatars.githubusercontent.com/u/87947051?v=4">
<!-- Twitter -->
<meta property="twitter:card" content="summary_large_image">
<meta property="twitter:url" content="https://laaouatni.github.io/">
<meta property="twitter:title" content="Laaouatni - Technical Documentation Project.">
<meta property="twitter:description" content="progetto HTML e CSS di Laaouatni Anas. codice su Github e Codepen (100% responsive)">
<meta property="twitter:image" content="https://avatars.githubusercontent.com/u/87947051?v=4">
<!-- font google api link -->
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@700&display=swap" rel="stylesheet">
<!-- icon for html -->
<link rel="shortcut icon" type="image/jpeg" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="icon" href="https://avatars.githubusercontent.com/u/87947051?v=4" type="image/jpeg" />
<!-- other meta tags -->
<meta name="robots" content="index,follow" />
<meta name="robots" content="max-image-preview:large">
<meta name="author" content="laaouatni" />
<meta name="copyright" content="laaouatni" />
<meta name="keywords" content="laaouatni, laaouatni anas, anas laaouatni, laaouatni html, laaouatni css, laaouatni javascript, laouatni, laoatni, laouatni anas">
<meta http-equiv="refresh" content="300">
<meta property="og:site_name" content="laaouatni">
<!-- android meta tags -->
<meta name="application-name" content="laaouatni">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="theme-color" content="#0000ff">
<!-- IOS Seo Meta Tag -->
<meta name="apple-mobile-web-app-status-bar-style" content="#0000ff">
<link rel="apple-touch-icon" sizes="48x48" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="72x72" href="/https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="76x76" href="https://avatars.githubusercontent.com/u/87947051?v=4">
<link rel="apple-touch-icon" sizes="96x96" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="120x120" href="https://avatars.githubusercontent.com/u/87947051?v=4">
<link rel="apple-touch-icon" sizes="144x144" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="152x152" href="https://avatars.githubusercontent.com/u/87947051?v=4">
<link rel="apple-touch-icon" sizes="192x192" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="256x256" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="384x384" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<link rel="apple-touch-icon" sizes="512x512" href="https://avatars.githubusercontent.com/u/87947051?v=4" />
<!-- microsoft meta icon logo -->
<meta name="msapplication-square310x310logo" content="https://avatars.githubusercontent.com/u/87947051?v=4">
</head>
</html>