When they are acting as advocates for a cause, people often say they are “advocating for”—say—traffic safety. This is not as widely accepted as “campaigning for” or “working toward.” Saying you are “advocating for the blind” leaves a lot of listeners wondering what it is you advocate for them. If you can substitute “advocate” for “advocate for,” you should do so: “I advocate for higher pay for teachers” becomes “I advocate higher pay for teachers.”