Bands are versatile, inexpensive and can be used to add or decrease resistance. Wonderful tool to use when you cant get weights or enough weights.
As well as you can utilize household things. Like folding chairs, rods, stairs, clothes and wood floor, door frames etc (dips, tricep dips, inverted row, incline or decline pushups, pull ups, sliding push ups, inverted bicep curls, slider lunge. Etc etc.