Does my blog help my website SEO?

[Gal]

To start with, you are doing good. And as long as you post quality content on your blog its fine. No need to link back much from the main site to the blog. You can also improve results and guarantee yourself against anti spam Google updates by having an author signature in the blog with a link to your G+ account. In the G+ account (in about) add both urls (site and blog).

Now, a better way would be to have the blog on the main site. Preferably as a dir, e,g mainsite.com/blog/ otherwise as a subdomain blog.mainsite.com

The blog is more than an SEO tool. You can actually gain a lot of traffic by building the blog's authority and number of regular readers. Connect the blog to social media accounts, tweet about your posts. After building a large audience you can leverage it.

Last thing. If you'd like to move your blog to the main site, its possible. Create one on your main site and redirect it correctly, post to post.

Hope that helps and feel free to ask any more questions you might have