To increase DA, you have to know your DA, and think about what you post.
If you post cat memes or music videos, your DA will go down.
If you post pictures of you helping the community, or talking about something you feel strongly about, your DA will go up.
Cloudflare is an IP (Internet Protocol) blacklist service. Their purpose is to hide websites from prying eyes by redirecting traffic through one of their private servers. There are huge positives to using Cloudflare - one being it's free (and with a free trial), though there are some cons...