Ad or Add?
Exemple : ‘’There is an ad on television for a new programme.’’
"Ad" and "add" are homonyms and thus they are often mixed up. "Ad" is used as a shortening of the word "advert."
Exemple : ‘’I am going to add my name to the list.’’
"Add" is a verb meaning to combine things together and can be used in a mathematical sense and also in a literal sense such as adding ingredients into a pan.