The Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) is a free trade agreement between 11 countries around the Pacific Rim: Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, and Vietnam. The CPTPP aims to create a fully integrated economic area by eliminating/reducing tariffs, liberalizing trade, opening markets up to foreign investment, etc.
It differs from the Regional Comprehensive Economic Partnership (RCEP) in that it has fewer member countries, but stricter conditions for joining (i.e. high liberalization requirements, strong intellectual property protections, high labor and environmental standards). The agreement was originally called the Trans-Pacific Partnership (TPP), but was renamed the CPTPP after President Trump withdrew the U.S. from the deal in 2016.