1- Resolution
The detail of an image based on the number of pixels is known as resolution. An image looks clearer when it has a higher resolution.

2- DPI
DPI stands for “dots per inch,” which is a measure of a printer’s quality. For high-quality printing, 300dpi is recommended. For example, a 300dpi image at 1200×1800 pixels will become as a 4×6 inch print.

3- PPI
PPI stands for “pixels per inch,” which is a measure of pixel density used by electronic image devices. You’ll likely see this used with scanners, cameras, TVs or monitors. Learn more about the difference between DPI and PPI.

4- Bleed
Sounds pretty gruesome, but bleed is when a design actually extends past its printed edge so there’s no chance of white borders when it’s trimmed down after printing.

5- Trim
Trim size is the final size of a printed piece after it has been trimmed from its page. Trimming is executed along crop marks that show where to cut.