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[mutago]

Happy Xmas everyone. please i need to understand the work of the following listed parameter in
search engine performance ie whether they will facilitate seo searching or not. please explain. thanks

1: <meta name="robots" content="index,follow">

2: <meta property="og:site" content="">

3:<meta property="og:description" content="">

4: <meta property="og:url" content="http://domain.com">

5: <link rel="canonical" href="http://">


what does this canonical also stands and its effect. thanks