What's+the+difference+between+early+decision+and+early+action?

Both have earlier deadlines for the submission of applications than the regular application submission date.

Early Action(EA) and Early Decision(ED) allow schools to start recruiting and looking over students earlier.

Early Action simply means that the student will turn in his/her application by the Early Action deadline.

Early Decision binds the student to a certain school so that he/she will have to attend if accepted.

Admission rates tend to be higher for EA and ED, but keep in mind that those who are prepared early and competitive usually submit their applications early.

You can find the deadlines for EA and ED on school websites.

Some schools offer EA or ED while others offer neither. For example, Harvard. Harvard does not accept any early applicants.