Ebooks are delivered almost instantaneously. You can purchase, download and start reading them within minutes, without leaving your chair. You don't have to go to a bookstore to buy them, neither wait for them for days, weeks and sometimes more to arrive in the mail.
No trees are required to manufacture paper for the pages of ebooks.
Ebooks are portable. You can carry a whole library of hundreds of books with you, on CD, in a laptop, notebook or any ebook reader, without worrying about their weight.
Ebooks are searchable. You can easily search for any information in an ebook, instead of turning page after page.
Ebooks can be interactive and contain audio, video and animations, which can enhance the message that the author is trying to convey.
Since ebooks are delivered through the Internet, there are no packing and shipping expenses.
Ebooks are very easy to to sell and distribute.