tags for linkedin, facebook…

I have trouble with some wordpress templates in a multisite installation.

For example, when I share a link in linkeind, it doesn’t get correctly the title for a post.

The tag <title> is ignored, and it gets the general title for the blog. Also shows the main url, and not the url of the blog, althought the link works.

What is the most used practice? Should I use a plugin to get specified tags? Should I use Open Graph tags?