when babies speak ?

My baby is 14 months old and only babbles or says dada but doesn’t know what it means ( as father ) and when i point who’s dada, doesn’t rnorhing.

so when babies should know words what they mean when speaking one ?

I’m concerned as a mom said to me her 14m old babies knows 4 words and also the baby knows what they mean and point to it.

Should i go to a pediatrician?