The most expensive and lowest quality producing way. If you can make it to the store spending a few minutes visually comparing products can really inform decisions.
If I want to look up more information on an item, I can do so at my leisure on my own WiFi network.
Rather than creating a list that I need to then bring to the store, I can idly add items over multiple days.
I can price match my items against multiple stores, moving the items to which ever store has the best deal.
Then I just checkout and pick it up or select a one hour window for delivery.
No more impulse buys. No issues searching the store because they moved things around for the third time in the year.
I rarely shop in store anymore and I don't miss it at all.
The online options are incredible convenient and I'm perplex that more people on a tech forum don't do the same.
The packaging disguises a lot of characteristics of the products being sold unless you're strictly looking at produce or raw meats.
I explicitly stated products other than produce and meats are in the category of foods that typically are difficult to gauge quality of.
To specifically list out the products I'm talking about, consider: milk, oatmeal, flour, snack foods, ice cream, beverages, cheese, broth/stock, prepared soups, condiments such as ketchup, cooking oils, packages of tea bags, breads, jams, and so forth.
Vegetables and meats are only slightly easier to gauge quality of because they are typically not packaged, however, anyone who cooks at home regularly can tell you that you still run the risk of getting bad produce/meats even with a close-up visual inspection.