A trunk show is an event in which vendors present merchandise directly to store personnel or customers at a retail location or another venue such as a hotel room.
Trunk Shows provide brands and designers with a targeted audience who have arrived solely because they’re interested in seeing what you have to offer. Also the brand and designers have the opportunity to speak one on one directly with target customers and tell them about the line, the design and manufacturing process of merchandise and really develop a personal relationship.

References:
DOMINIQUE LEGER,(2012).WHY TRUNK SHOWS WORK FOR YOUR FASHION BRAND.Retrieved from:
https://startupfashion.com/trunk-shows/
Trunk Show-Wikipedia.(2018).Retrieved from:
https://en.wikipedia.org/wiki/Trunk_show