To give assistance or support to someone in order to make a task easier or more manageable. She offered to help him with his homework.
To improve a situation or make it more bearable. The medication helped reduce the pain.
To serve or provide someone with food or drink. Can I help you to some more dessert?
To prevent or avoid something from happening. I can't help laughing at his jokes.
To be of benefit or use (often without a direct object). Every little bit helps when you are saving money.