In a national show the quilts are juried in. You send photos, the judges look at the photos and as I understand it on the first go through each quilt gets about 30 seconds because they have so very many to look at.
From that first keep discard the photos go again and they spend time looking at close ups etc.
From there they narrow it down to the best of the best and let the quilter know when to ship.
Once the show is hung the judges come through with the check list and give credit and critiques for each quilt.
the points = 100 and cover over all impression, technical skill etc. Cat hairs and smells and loose threads really hurt the points
For local guilds, they are generally looking for all they can get from the local area.
Many are not judged at all other than Viewers Favorites.
A simple well made quilt is a thing of beauty, just keep working on your skills!
Sometimes guilds don't accept quilts except from members of the guild in highly populated areas.