From the repo:

A random DNS and HTTPS internet traffic noise generator provides enhanced privacy and security by obfuscating users' online activities. It generates random, non-user-initiated queries to DNS servers and encrypted HTTPS connections, making it difficult for third parties such as ISPs, surveillance systems, or malicious actors to analyze and track actual browsing patterns. This added layer of traffic noise reduces the effectiveness of traffic analysis and profiling techniques, making it harder to identify specific behaviors, websites, or services accessed by the user.

Technically, even if your data is encrypted, the amount of data you send (and the time between packets) can be analyzed to at the very least figure out what website you're on, and who knows what else (i.e. Youtube's HTML, CSS, and JS files will be different than Facebook's, so the amount of data sent will be different, and you can train an AI to recognize these patterns). This app pretty much it protects you against packet analysis from your ISP or anyone else who could monitor your network. I guess this assumes that you're using a VPN or some sort of proxy since it's not very useful otherwise.