To "review" means to read/study/see, or to evaluate something (e.g., to review a document by reading it, or to review a film as a critic). It is also sometimes used to mean "read/study/see again" (e.g., "Did you review your notes before the test?").
To "revise" means to change something (e.g., you might revise a document after reviewing it). "Revision" is the noun form of "revise" (e.g., "He made a few revisions to the spreadsheet").