How much is Polygon transfer fee?

I'm curious to know, what exactly is the transfer fee for Polygon transactions? It's important to understand the costs associated with moving funds on this platform, as it can have an impact on users' decision-making process. Is the fee a flat rate, or does it vary depending on factors such as the transaction size or the current network congestion? Additionally, how does Polygon's fee structure compare to other popular blockchain networks, and what are the potential benefits and drawbacks of using Polygon for transactions?