Hi I noticed that most of my visitor users comes from Google search (about 50 per day) and they are searching for brand name. Do you think it's a good signal for google, and google may start give more importance to my website, starting to ranking it also by keywords?
Yes It's a good signal from google for your website. You have to Retention this.If you can Retention this your keyword will be ranked by Google.
If a Brand Name is getting traffic , it is most probably because of the EXACT SEARCHES , try to check how many exact searches the keyword is getting and if it is high then do a bit of SEO and you will get alot more hits daily