What is the difference between 72 dpi vs 300 dpi?

D.P.I. stand for "Dots per Inch." It's the measurement used within the printing and graphics design industry to determine how sharp an image is.

The difference between 300dpi and 72dpi is found in the amount of pixel information (or dots) for every square inch of the image you are viewing. The more dots/pixels the image contains, the sharper the image will print.

When designing graphics for commercial printing purposes, your images should be 300 dpi.

Web graphics and online photos are normally created at 72dpi. This low resolution is great for the web. Not great for your business cards.  

Printing will look blurry if a 72dpi image is used as compared to using a 300dpi high res image.