Thankyouforaskingthequestion.
Tostartwith,itisobviouslynecessaryforustopackageourproductsinordertoholdthem.Besides,wepackageourproductstoprotectthemfromdamages.Asyouknow,someproductsthatmadeofglassorsmethingelsecanbeeasilydestroyedbypressurecomingfromoutside.Itwillbeaneffectivewaytoprotectthembypackagingproducts.Lastbutnotleast,consideringthatconsumersprefertopayfortheproductswell-packagednowadays,Ibelieveit'salsoagooodwayformerchantstohelpselltheproductsbypackagingthem.
That'sall.Thankyou.
(ps:我认为第一句中的hold只是单纯指盛放、支撑的意思,不是保证销量的意思,否则和第三点重了;其次,我能力有限,也不知道你这是应付什么难度的口语考试,暂时先写这么多,有问题你再Hi我~)