The word bother has many shades of meaning, but most of them involve trouble of some sort. You might wonder why you should bother to follow a recipe, until you taste what you've made without one.
As a verb, bother can mean that you take the trouble to do something. It’s often presented as a negative: you might not bother to lock the house, or you may wonder why you should bother reading the instructions that came with your phone. Bother can also mean that you’re bugging someone or causing a minor inconvenience. The word can also have a sense of deeper worry, especially when something is bothering you, like a nagging sense of guilt.