More info at IFTTT's WTF page.
Combine Channels together to make recipes that execute tasks for you.
More than 60 channels available to make thousands of different combinations.
Add a channel, add another channel, create a recipe, and you have a task. It's like witchcraft for the web without the eye of newt (unless that becomes a service).
Tasks are executed every 15 minutes to do what you want. There is a list of recipes available for you to get started.