The Common Application, or the Common App, makes applying to college much easier. It is a single college admission application that can be used to apply to 517 various colleges throughout the country. The main idea here is to save prospective students from having to fill out multiple college applications that essentially ask the same questions.
There is a Common Application for first-year admission and one for transfer students as well. Both applications can be just filled out once online and submitted to as many of the 517 member institutions as you like.
Some institutions using the Common Application may also require a Common Application Supplement to ask additional questions for admission consideration.
You can visit the online application here and complete and submit it to all schools with the click of a button.