It's the main fairground of town and considered one of the largest in Europe. It is situated during the Campo de las Naciones area, near the Madrid-Barajas Airport. IFEMA has lots of pavilions and exhibition spaces, in which quite a few fairs and events from diverse sectors are held. https://iodirectory.com/listings13060095/detailed-notes-on-empresas-de-montaje-de-stands-ifema-madrid-stand-assembly-companies-ifema-madrid