Hey @Jan_Sokolovits, investing feature is where you can support the pDEX by adding liquitity and earn rewards on your contribution. By this activity, you will also help provide the privacy for the cryto currency world.
Please check Liquidity rewards program for further information.
But I have have prv and another token correct?
Yep with Provide functionality, it’s mandatory to provide both tokens at once.
If you want to provide only one side, follow this topic Coming soon: Pool v.2