My son is 2 yr 10 months old & he is not properly talking. He speaks only single words. Can you suggest me what should I do?

Some kids speak later. I have a friend who has a 20 month old boy that doesn't speak much while my girl (who is now almost 15 months) started saying words at about a year old. My friend did point out that so far all the kids she has seen who are late speakers have better motor skills. True for my girl. She is better linguistically but her motor skills aren't that refined. If you're really worried then check with a pd.