Clicking on the Advanced button gives you even more options and more access control. Access controls also allow you to control who can run a program. If you don't want your young children running certain programs you just deny them Execute access to the program. Unlike the disk compression available to Windows 98 users, NTFS compression is done on a per file or per folder basis. That gives you the ability to compress only those folders and files that really need it such as large seldom used files or folders that are archives of older data.
Compression saves on disk space.
Encryption grants security. Once you encrypt a file only you can read its contents. You may have seen shareware and commercial programs that allow you to encrypt files. There are no passwords to remember and no special programs to run to decrypt the file. NTFS uses its own built-in encryption algorithm to make sure that you and only you can read the encrypted data.