You did not say about the backlinks, which also need to gradually build up to grow the site in search engines.

The presence of backlinks gives a site one thing - link mass. This is the total value of all mentions of resource X on the Internet.

Backlinks from blogs or communities help to bring targeted visitors without intermediaries in the form of search engines, as well as increase their number.

The promotion of a resource in groups or communities affects the quality and quantity of backlinks, because the more backlinks, the more users will see them and learn about the site. But everything is good in moderation.

For spam community backlinks optimizer can be excluded from the community. Obtrusive advertising site has never been to anyone's liking.