Bleeds
Here's what you need to know
Bleeds allow for the tiny variances that are inherent in mechanical printing and allow your design to run all the way to to the edge.
Bleed Area
Everything within this space will be trimmed off. However, you should still extend your design to the edge of this area to prevent the appearance of irregular white borders.
Trim Line
This dashed line shows the edge of your card design. It's where your card will be cut.
Safe Zone
Anything inside this is safe, so you'll want to keep all your important content within this box.