The perception of how much effort is used to create a quality store environment can affect whether prospective visitors turn into a paying customer or whether they teleport away never to be seen again. Three of the factors that may apply to store quality include the arrangement of prims (i.e. textures, sizes, and organization) in the store, information visible on signs (i.e. pop-up notices and store policies), as well as parcel settings (i.e. name, media, restrictions).
The arrangement of prims can set the tone of the store depending on whether they appear to be rezzed in an organized fashion or scattered around the store at odd angles. Textures used in the store should be something other than the default of plywood and plain at a high enough resolution to show details, but not so high that it takes a long time for the texture to come into view. Alpha textures can be viewed from all angles to ensure there are no glitches and non-alpha textures at the same level overlap with each other resulting in the viewer randomly toggling between the two (sometimes referred to as flickering).
The purpose of signs in a store is to be informational without being too intrusive meaning landmarks and notecards are to be offered to the visitor only once, not every time they happen to walk into the sensor area. Store policies such as return, custom orders, post-sale support, and gifting options need to be clearly visible and available. Finally, any vendors that dispense a product needs to include not only the price of the item, but also the number of prims required and permissions allowed.
Parcel settings can either enhance the shopping experience or hinder it. For example, if the parcel is set to no-scripts then the chances of lag affecting avatars is minimized, but setting no-scripts might also disallow visitors from using their favorite HUD. Media settings such as music and sounds cannot conflict with each other, if there are sounds that you want the visitor to hear then a music stream playing at the same time may result in them not hearing the intended sound. Finally, the name of the parcel and description should be informative enough so that if the visitor decides to create their own landmark (rather than accepting yours) it will be informative when they are looking through their inventory window later.