autoindent
- copy the indentation from the previous line, when starting a new line
smartindent
- automatically inserts one extra level of indentation in some cases, and works for C-like files
cindent
- more customizable, but also more strict when it comes to syntax
shiftwidth
- amount of indentation used for one level in automatic indentation and affects what happens when you press >>, << or ==
tabstop
- changes the width of the TAB character
set hlsearch
- set highlight when searching
:noh
- turn off this search highlight