Knitting help for sock

pardon me, im trying to help my grandmother with her sock pattern
she is having problem understanding what " INC 1 stitch on the purl side" thanks for your help

Sounds like the sock may have a purl side and a knit side. The increase should happen on the purl side of the sock and here’s a video that may help show your grandmother how to. Good luck with it!

Do you know if the socks are knitted flat on two needles where there would be a knit side and a purl side, or in the round? Just a thought, maybe she is doing the heel flap, which does have a knit side and a purl side.

thanks alot, she understood , she doesnt like it but she understood haha appreciate the help