I heard that some dreams mean sumthing and others mean sumthing else. wat do they mean
The meaning of dreams basically depend on individual. However, there are general meanings for certain things and that is why they called those things "symbols"
For example, snake or spiders normally symbolize fear. It is because most of human beings fear of those creepy crawling things. However, if you have snake or tarantula or spider as pet, or if you study animal science, dreaming of those things can mean friendship, learning opportunities depending on how you feel in reality.
So, yes, things can be different to different people with different life style, culture and beliefs.