A grammar error that I often see in my own papers is the use of “ad” and “add.” For a long time I thought that it was only wrote as “add” but here are some tips to know the difference!
*Ad: A public promotion of some product or service
Example: He put an ad in the paper to sell his home.
*Add: Make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
Example: You don’t have to add insult to rejection.