Eastern Bangkok's convention district and surrounding suburban area — mostly business but with weekend purpose.
Bangkok International Trade & Exhibition Centre — most large conventions and trade fairs happen here; if attending a conference, this is the area.
One of Bangkok's largest malls — IKEA is here; less tourist-focused but worth knowing if you need a specific store or a massive food court.
BTS to Bang Na (end of line), then BTS extension or taxi; 30–40 minutes from central Bangkok.
Minimal reason to visit unless attending BITEC or shopping at Mega Bangna — good to know it exists when conferences bring you here.