I havent seen the wiki page for pcall and spawn yet, but I believe I can get a more descriptive way on here, if anyhow possible try to make the explanation easy to understand.
heres the awner:
Pcall
can be seen short for protected call
, which when an error occurs, it'll prevent it from breaking the rest of the script. As for spawn, it creates a separate thread than the rest of a script.I hoped i helped :D