What happens during staking and how safe it is?

Hey Guys ,

It's been half a year since I started reading up more on blockchain and twitter. Usually I try to understand something before I invest more money into it.

The practice of staking seems to gain popularity in recent months. Now I was wondering how this process exactly works and how safe it is. Hypothetically, couldn't anyone run off with my coins if I borrow it to them for staking?

Additionally. What are some trustworthy sources I can read(or watch) up on this matter and understand the workings behind it?

Edit: and which staking platforms would you recommend?