This report details the main outputs of the Webinar prepared and held on the Multi‐pest Survey Optimization (OptiPest). It was the third Webinar of a round of three, promoted by EFSA in collaboration with academic experts under the Framework contract for Technical and scientific support to EFSA training courses on plant pest surveillance for improving crisis preparedness in plant health. The Webinar provided an overview of how this tool is used in dealing with multiple pests and demonstrated how to optimise survey efforts. The recording of the Webinar is uploaded on EFSA YouTube official channel and in a dedicated EU Academy section.