noun
in-store customer; visitor to a shop
Refers specifically to a customer who physically visits a store or establishment, as opposed to online or remote customers.
来店客にアンケートをお願いした。
We asked in-store customers to fill out a survey.
新商品のおかげで来店客が増えた。
Thanks to the new product, the number of visitors to the store increased.
来客 means 'visitor' or 'guest' in general, not limited to a commercial context.
Compound of 来店 (raiten, 'visiting a store') and 客 (kyaku, 'customer').