If you turn on spelling with
set spell, Vim will highlight any words it
considers misspelled. For a large document it can be tedious to scroll
through and find all of the spelling errors.
Fortunately, Vim makes it easy to jump to the next misspelled word. Hit
and your cursor will be transported to that word.
[s to jump backwards in the document to the closest
misspelled word behind the cursor.
h ]s for more details.