Positioning is the place you want your business or establishment to have in relation to your competitors in the minds of consumers. Positioning refers to the level of the range you offer, the prices you offer, the target audience(s) you are aiming at, but also the tone of your communication, etc.
Before launching your business, have you definitely thought about the image you would like customers to have of your business: a delicatessen with ultra-exclusive products? or the general food store on the corner, accessible to everyone but in an organic version? or the food store for people in a hurry who are ready to spend more money to save time in the kitchen?