South–South and triangular cooperation (SSTC) can play a catalytic role in accelerating progress towards the SDGs. SSTC is at the heart of FAO’s and the UN Office for South-South Cooperation (UNOSSC) operations. To further promote the key role of SSTC, FAO and UNOSSC are jointly launching the South-South in Action publication: “South–South and triangular cooperation in agricultural development: FAO’s experiences”. This publication describes FAO’s engagement in SSTC in support of efforts to boost agricultural productivity, enhance food and nutrition security, and alleviate poverty in developing countries worldwide. It provides a snapshot of FAO’s engagement in SSTC through three case studies on grassroots development, institutional capacity building and policy.