What do people use MetaMask for?

So, let me ask you, what exactly is the purpose of MetaMask? I've heard it's a popular tool in the cryptocurrency world, but I'm not entirely sure what it's used for. Do people primarily use it for storing their digital assets securely? Or is it more about facilitating transactions and enabling access to decentralized applications? I'm curious to know what makes MetaMask so valuable and what types of users typically benefit from using it.