The electrics don't have any user serviceable parts - assuming you want to keep your warranty. Otherwise just basic bike maintenance. Keep it clean, store it indoors, lube the drivetrain as needed, check and correct spoke tension periodically, tweak the rear mech when the cable stretches, check for drivetrain & brake pad/rotor wear, and check bolt torque once in a while (maybe go in and put blue loctite on everything). After washing, inspect for damage. Some ebike owners who lean hard on the motor find that the rear wheel needs more care than analog bikes. That's about it. If you bought from a shop, they'll probably do most of this for you for some stated period.