What does the SLAPP tag mean?

What does the SLAPP tag mean?
This tag describes situations involving Strategic Lawsuits Against Public Participation (“SLAPP”), which are lawsuits lacking a sound legal basis which are brought with the intent of forcing a party to restrain its speech. These situations often involve anti-SLAPP laws, which allow parties in some cases to defeat SLAPP lawsuits if they can convince the court that the the lawsuits are improper and fit certain criteria.