[shmel]

It's literally in their FAQ: https://www.getmonero.org/get-started/faq/

Anyone curious about how Monero is implemented would immediately understand why it's a bad idea to use remote nodes.

>What is the difference between a lightweight and a normal wallet?

>For a lightweight wallet, you give your view key to a node, who scans the blockchain and looks for incoming transactions to your account on your behalf. This node will know when you receive money, but it will not know how much you receive, who you received it from, or who you are sending money to. Depending on your wallet software, you may be able to use a node you control to avoid privacy leaks. For more privacy, use a normal wallet, which can be used with your own node.