Pink Bleed Line
Bleed is the area of the paper that will be trimmed off once a document is printed. Having a bleed means that a design will be printed on a larger surface than the intended size to avoid an undesired white space or border around the design. This helps prevent objects from being cut incorrectly.
Crop marks are the exact points in proofs that printers cut off in the page. This will be automatically set up when you click the Order prints button.
Both bleed and crop marks are common printing terms part of the printing process which ensure the quality of your printed document.