Warp is a set of apps that will set your phone (and with this, today, your computer) to use 1.1.1.1 for resolving your DNS. But additionally, it uses the Wireguard protocol to connect, which is a VPN protocol. This hides the contents of your connection from your ISP or network provider. It does mean you're connecting to Cloudflare, and so we've made a bunch of privacy commitments, and gotten external auditing to back those up: https://news.ycombinator.com/item?id=22747770
The above is all free. You can pay a small subscription fee to get access to Warp+, which uses Cloudflare's "Argo" product to route your requests faster.
Does that make more sense?