Imagine a bee flying directly to a flower. It doesn't waste time or go in circles, it goes straight for its target. That's what it means to make a beeline.
Here are some examples:
* "When the pizza arrived, everyone made a beeline for the buffet table."
* "After the concert, I made a beeline for the exit to avoid the crowd."
* "She made a beeline for the coffee shop, desperate for a caffeine fix."
It's often used to describe someone going towards something they want or need, especially when there are other things that could distract them.