Can you clarify the question for us? I'm just guessing this is what you're looking for.
One negative aspect of online shopping is that it removes the personal contact a customer is used to, which often influences their shopping habits. It reduces the tendency to impulse buy, to grab something near the register, or see something on sale that you hadn't planned on buying, or in a clothing store, to accessorize. When people physically come to a retail store, they are already looking, whereas you have to lure people to an online site.
Much lower percentages of African-Americans and Latinos have regular internet access, so you narrow your target demographic.
On the plus side, if online shopping is in addition to the retail outlet, you can offer extra specials online, attract housebound customers, and the system is nearly weatherproof, and available 24 hours per day, with virtually no labor overhead costs.
In general, offering online shopping can be good or bad for a retail chain. Typically a retail chain will offer online shopping in hopes of expanding their market share and of reaching customers that they might not otherwise reach.
One can argue that online shopping is a bad thing to offer, however. It is possible that going online will take customers out of the stores.
Therefore, a chain starting on this route must be sure that its online customers will not be less profitable than its "in person" customers.
Honestly I do not think much of it but I hate when the website has great pieces that are never even sold in store. Seriously I thought that the whole point of having a website is to showcase pieces that are sold in stores but big companies know not of such things.
Online shopping is good because seller can increase their sale and can expand their market share to those who can't come to their store. Its also better for buyers who don't have time or want to save money on gas.