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Hey there! Thanks for reaching out to us! You can find the relevant information here: https://moz.com/privacy-policy (In short, we don't) Feel free to reach out to help@moz.com if you have any further questions,

I would increase the amount of great content and improve the quality of the content that is already in place.  Content is what people link to.  Great content = quality links = high DA.

Domain Authority (DA) is Moz's way of telling us how well a website should rank, using a 0 to 100 scale. The higher your domain authority is, the more likely you are to earn a higher search engine ranking and to receive more and better web traffic.

I understood the problem, thanks for your help !