Alloy and foundry

I have had the website for a few weeks now.
in use, I have added the blog addon alloy to it.
What strikes me id that with the added blogs I am rising tremendously in the google ranking with the blogs created. Advertising with google I find very expensive and remains for me a big gamble, then this is a great scoring tool.
Maybe others have more positive experiences.
Are there people here who know of any other tools to boost the ranking?