I would not call reviews and ratings an advantage of online shopping -- I think those exist to mitigate a major disadvantage, which is that you can't see/touch/try on the item for yourself before buying. I also think 99% of reviews are useless in terms of telling me anything I want to know.
I would caution people from making a firm conclusion that online shopping is less environmentally friendly than brick and mortar retail. I think certain aspects of the environmental impact, like packaging, are more *visible* to us with online shopping. But I think there are also aspects of brick and mortar retail's impact that we don't commonly think about, such as the emissions involved in heating/lighting retail stores.
A lot of life cycle analysis studies find that under certain conditions (the devil is ALWAYS in the details) online shopping for groceries for example is better for the environment -- I couldn't find a recent study that was specifically about clothing shopping though. (There is a study from this year that looks very good for brick and mortar retail but it's not peer reviewed and it was funded by a mall owner. Looking at it briefly the aspects of environmental impact they include and leave out does not seem very rigorous to me.)
I am not saying this to shame people into shopping online -- I think we need to make every option radically more environmentally friendly, and people should do the best they can in the meantime, with the most environmentally friendly option being the one that most effectively gets you the clothes you will actually wear.
/Soapbox lol
