When should I use .bashrc and when .profile?

I am basically putting all my settings into my .bashrc and when I was using zsh it was all in my .zshrc. The Rust installer just informed me that it has added the new installation to my PATH by modifying .profile. **When should things go into ~/.profile?** Is it only doing that because it doesn't know which shell I am using or should all somewhat general settings be in .profile?