First of all, what is a RPC?

Remote Procedure Call is a technique for building distributed systems. Basically, it allows a program on one machine to call a subroutine on another machine without knowing that it is remote. RPC is not a transport protocol: rather, it is a method of using existing communications features in a transparent way.

Why should you change it?

Sometimes the RPC you are currently using may have a problem and not work properly, which may return an error in game or prevent you from playing.

Therefore, we advise you to change it to another working RPC.

How do I change my RPC?

First of all, if you are currently connected to the Polygon network you will not be able to change it. Simply change the network with the dropdown list at the top of Metamask, connect to the Ethereum network for example.

Then, simply go to Settings > Network > Polygon Mainet

Once in the Polygon network settings, you can change the URL of the RPC, that's what we are interested in.

Replace the URL of your current RPC with one of the ones below

https://polygon-rpc.com
https://rpc-mainnet.matic.network
https://matic-mainnet.chainstacklabs.com
https://rpc-mainnet.maticvigil.com
https://rpc-mainnet.matic.quiknode.pro
https://matic-mainnet-full-rpc.bwarelabs.com

Here's another list of RPCs you can use: https://chainlist.org/chain/137 

Once done, just click on the big blue "Save" button and you're done!