PRISMA stands for Preferred Reporting Items for Systematic Reviews and Meta-Analyses and is a set of guidelines designed to improve the quality of systematic reviews.
PRISMA includes a 27 item checklist that covers everything from the report title and abstract to declaring competing interests and support (you can access it on PRISMA’s website here). There is also a PRISMA workflow that can help narrow down the results of your systematic review literature searches in an objective and repeatable way (access the flowchart on PRISMA’s website here).