How to include links to social networks in posts?

Developer help Self-hosting
1

And also tell me how to include links to social networks in posts, I didn’t understand

2

  1. On the social network site, copy the URL of the page you want to link to.

  2. On Ghost, highlight the text you want to link.

  3. Select the link icon and paste the link. Configuration - Adapt your publication to suit your needs

3

I didn’t understand anything