How to promote pages in social networks for free?

Question

Facebook

There is a company blog, we registered on facebook, linkedIn, Twitter, Google+
I want to attract the maximum number of readers to pages on social networks without buying advertising.
We have already taken into account that, first of all, the material itself should be interesting.
On LinkedIn and Facebook, we have pages, not groups, which complicates the task somewhat.
What methods I already know:
Twitter
- Subscribe to pages similar in topic, there is a chance that they will subscribe to you too
- Add tags before the post title
- Put likes from the
Facebook
profile - Share articles from the company page in
Google +
thematic groups - You can add to circles profiles similar in theme
LinkedIn
- Didn't find a way

Answer 1

The main question is "why?" The sea is handmade - the exhaust is minimal. In my opinion, paid promotion works, but free promotion does not (more precisely, it works, but the result is close to zero).

Answer 2

1) x*ita
2) it works, but cunning guys, oh, the moderators of the groups flog and can ban ask for money for activity in the comments
3) x*ita
4) until the hands are paid

Answer 3

Free is ineffective. It is better to pay a little and get a guaranteed promotion, at the same time you will save your nerves. The site avi1.ru has services for inexpensive promotion in social networks, I used it. Good service.