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?

my son is 1year and 7months which I have no idea what that means but we had to put in him some speech language program apparently he scores low communication skills but he is only 19 months September 4 2017 is birthday. he still not verbal speaking but he s saying a few small words n small sentencing. try getting your son into speech classes that should help