What does post-conviction relief mean? Specifically for the victim?

Oh I am here again with anothet question about this case I am sure you all are getting sick of. Sorry.
So if he plead guilty, was sentenced, and there is a thing online that says he is giving notice of intent to pursue post conviction relief, what does that mean for me, the victim? I say online because I was looking up a date related to the case and I noticed it. Just curious about it, I am sure my advocate would notify me if it involved me but it sounds like (based off google) this is a way for him to try and fight the outcome so I am worried.

To explain more: You can google court cases for your state and search people, and find information. I am not dwelling on this, just double checking the sentencing date for a transcript request that is it, and I saw it.