It can be used in a few different ways:
* To express that you are staying in a place: "Yo quedo aquí" - "I am staying here"
* To indicate that something is left over: "Yo quedo con una pizza" - "I am left with a pizza"
* To express that you are still doing something: "Yo quedo con la tarea" - "I am still working on the homework"
Important note: In some regions or contexts, it can also be used as a slang term for "I'm cool" or "I'm good," similar to how "I'm down" might be used in English.
It's important to understand the context to determine the exact meaning of "yo quedo."