A Practice Note explaining the procedure for a special motion to dismiss under Massachusetts General Laws Chapter 231, Section 59H, known as the Massachusetts anti-strategic litigation against public participation (anti-SLAPP) statute. This Note explains procedural issues for a special motion to dismiss, including the deadline to file the special motion, the parties' respective burdens of proof, the available relief, the availability of and timing for appealing a ruling under the anti-SLAPP statute, and the assertion of an anti-SLAPP statute defense in federal court. This Note also discusses strategic considerations for raising or opposing a special motion to dismiss under the anti-SLAPP statute.