Gridcoin is to compensate volunteers for their work and electricity donations for research on BOINC. This add additional value to the project, maybe very good for future development and promotion of science.
Below are articles from Publish0x 0n how to set up BOINC client on a PC or Android mobile. (Android is a bit complex).
Payouts are very minor but still good for developing this project. (There are also Gridcoin faucets that pay in addition and bit more)
I compute on 1 laptop and 2 old tablets and WCG project is always running where other projects do not. But on mobiles I compute without Grcpool in another team.
Maybe I stop on this ancient device. Another tab has 8 processors and compute 8 tasks at a same time : WCG and Rosetta@home.
There is also a BOINC LBRY podcast about Gridcoin:
...and you will also help the author collect more tips.