The golden bug net is a rare item that allows you to more easily catch bugs.
How to get the golden bug net
All you need to do to get the golden bug net is to catch every type of bug. Once you have done that, the game will tell you that you have just caught the last type of bug that you need for a complete collection. The next day, Tortimer will be outside of your house. Talk to him and he will give you the golden bug net.
What does the golden bug net do?
The golden bug net has a bigger opening for the net, making it easier to catch bugs. You don't need to cast the net as precisely as you did with the normal bug net.