What to do with it?

Question

Google

there are three sites (of the same company, a similar field of activity, different directions), groups in social networks, not a single blog, a bunch of forums where they post their activities.
from this it is necessary to make something more productive and increase attendance by 2-3 times.

Answer 1

You don't know what you need. Decide what exactly you need, tell us about the scope of the companies, show the sites, and then you can advise something.

Answer 2

you have a question like "I have something, I want to increase this something, what to do"
Move towards analytics and coverage of user needs. not in reverse?

Answer 3

Check out the growth potential. If competitors go 10 times more, then there is potential.
Make the site accessible and user-friendly, study the needs of visitors, what you can give them. Tie some business processes of the company to the site that would encourage the user to return to the site. For example, convenient and fast checkout for regular users.
A simple example. Here you have, for example, a business card site. The main function is to inform a potential client about its existence. After the client has studied the information, he no longer needs to go to this site. And if this site is expanded and functionality is added that will be useful to the client, then traffic will increase.
Make a chip that will "hook" all regular and potential customers to the site.
I can not advise anything else until there are specifics on the site. On a specific example, you can come up with 1000 and 1 way. And so the naked theory.