I would love to buy things that are difficult to find in the local store, that are too heavy or too huge to take back home, and that has a bigger discount online.
Electronics and home appliances are cheaper online and free shipping cost. If you browse sometimes and Google will keep pushing the promotion ads to you, which is annoying but save some bucks usually. Also, I have installed Honey extension on my browser, which would tell me the deals that the website page I am viewing gets.
I love to buy things that are difficult to find in the local store, especially Asian cosmetics like the facial mask and refresher oil. There's an amazing Thai oil that could help me to release the tense muscle after working out. Also, some beauty gadgets like flat iron are also easier to get online.
Toilet paper, napkins and other paper products are always at the top of the online shopping list. They are much cheaper online and they take too much space in the car if I buy them in stores. And detergents are not that easy to carry to the parking lot, which I am happy to shop online.
But there's one thing we all should remember: never shop from weird or unknown websites with the unbelievable discount offer, which might cause identity theft that could lead to financial loss and other destructive damages.