DJ originally meant "Disco jockey", that is, record knight.

But now this term has been widely and meticulously applied to all kinds of entertainment activities, and wedding DJ is emerging.

wedding DJs are generally held by radio DJs, dance DJs and so on. Not the host upstairs.

The task of the wedding DJ is to choose the appropriate music according to the environmental factors and personal preferences on the wedding day to set off the exquisite links. Simply put, it is to design and play music at the wedding. This link can also be completed by the band, but the cost is higher.

I hope my answer will satisfy you, hehe, I am a DJ.