We all are actually offsprings of saptarishis and on their name is gotra.like kashyap.bhardwaj,gautam..

These all names are taken during sankalp..Hinduism says that if u do anything without sankalp that is worthless..

So priest enchant sankalp in which whole intro of you is there as per hinduism..which consists of the date tym your whole introduction. As well as place and your objective..

For example in law today if u file an affadavit you give your full name adrress date and time is mentioned and objective.

Similarly there also..and it somehow praise tht rishi of whom we are..like if somebodya says son of xyz did gud thind.xyz is praised. So similarly gotra rishi is praised..

Now regarding nakshtra its all about the current tym as i told tym and place is mentioned..nakhtra pal and ghatika makes lagan chakra.which all makes current tym..

So significance is just to know the god that at this tym offspring of that sage this good deed for him.