Disc pads in the right shape and compound for heavier, faster e-bikes.
E-bikes are heavier and faster than the bikes their brakes were designed for, so pads wear quickly and matter more. A 65-pound fat-tire bike with a rider and a bag coming down to a stop sign from 20 mph puts far more heat into the pads than a regular bike, and budget resin pads can glaze, fade, and wear down in a few hundred miles. Replacing them is a 15-minute job, but it only works if you buy the pad shape that fits your caliper.
Pad shape is set by the caliper model, not by the bike brand. Shimano's common two-piston calipers use the B-type pad (B01S resin and its metallic siblings), while Shimano's Deore XT and SLX level calipers use the D-type, and its four-piston trail calipers use other shapes again. Tektro and TRP calipers use several shapes depending on model, Magura's two-piston MT calipers take one pad family and its four-piston calipers another, and budget Zoom and Logan calipers found on many online e-bikes have their own. The caliper model is usually cast or printed on the body; match it to the pad listing's fit chart and, if in doubt, pull a pad and compare its outline to the photo.
Compound is the other choice. Organic or resin pads are quiet and bite well when cold but fade with heat and wear fast; sintered metallic pads last longer and handle heat and wet better but can squeal and are harder on rotors; semi-metallic splits the difference and is a good default for e-bikes. Note that some rotors are stamped resin-only and should not be paired with sintered pads. Confirm on your bike before ordering, and if you are not sure which caliper you have, the model number is your starting point.