Metadata facebook

I would like to add metadata to make links from my social networks like facebook, but I don´t know where I can incorporate that metadata
specifically I want to incorporate

<meta property = "og: url" <meta property = "og: type" <meta property = "og: title" <meta property = "og: description"

you can add any custom header tag including meta ones, in your journal. follow this path:

Administration > Hosted Journals > Setting Wizard > Indexing

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Thank you…
But my problem is that my metadata contains information about the articles, changes the information according to the article