You will quickly discover that typing is somewhat awkward and the less typing you have to do the better. Creating your account here will enable you to save those fingeraches. You can edit the list using any compatible browser and your contact list will be available to you when you logon. Timed reminders is the ability to schedule a message to arrive at a specific hour of the day. This offers a greater degree of customization and allows your own messages to stand out a bit better from the rest in your Inbox.
Periodic reminders are a special type of reminder.
They can be setup to be sent on a periodic basis, i.e. once a week or once a month, every five days, or on a specific day of a week, you get the idea. Keeping stock reminders is handy when you frequently send out a similar message on a irregular basis. These will saving typing when at the terminal. You can enter your messages in advance at your desktop computer, and use them later from a cell phone just by clicking on the message.