收到 (shōu dào) means 'to receive' something that is sent or delivered to you, like a gift, letter, or notification. Unlike the broader 收 (shōu, can also mean collect/tidy up) or 得到 (dé dào, get/obtain by effort), 收到 focuses on something arriving to you. It's more concrete than 接受 (jiē shòu, to accept an offer/idea).