How effective is scar massage?

I am nearly 4 months postpartum and I have been doing scar massage the past few weeks, but not as consistently as I’d like because I keep forgetting. I only started more recently because I had problem with the healing of my scar so didn’t want to aggravate it but as soon as it had healed I started.

How long does it take to see a noticeable difference in the elasticity and things like that? And how long did it take where it got to the point that you saw that it noticeably improved your c section shelf?

At the moment I can’t feel a think line where the skin has obviously come together, how long does it take for that to go?