Ethereum noobie looking to understand the solution to gas fees?

I'm hoping somebody can, as simply as possible, explain to me how Ethereum will solve the gas fee issue.

As I understand it, Layer 2's play a role but I'm not exactly sure how. If Layer 2's are the answer, should I look at Polygon more seriously? I have yet to purchase any MATIC but it seems to me if they are crucial to Ethereum's success, it wouldn't be a bad coin to hold.

As the title says I am a noobie and have only been in this space for about a year. Any information would be greatly appreciated.

Thx