Although satire is usually funny, it differs from comedy in at least one important way: whereas comic laughter needn't be directed at any particular target, satire is always derisive.
Satire, most of the accounts say, began as simple invective. ??? Satire is not the same thing as parody, although satire can use parody as a technique.
Note: This guide is still in the early stages of development.
Three question marks mean I have to write more on the subject. Bear with me.