In the paleolithic era, we only used the resources nearby, and didn't travel long distances to look for better things. Since we were always tracveling, we didn't have time to look for interesting things to make life easier.
Once we developed agriculture, trading became more and more popular. We traded when they wanted access to things that we didn't have nearby. We like to trade for things to decorate, too.
Neolithic people conducted trade by using items nearby and traveling long distances to trade them with other people. We hoped that people who lived in different places would have different resources. We didn't only trade resources though, we also spread our knowledge and ideas when we traveled.
Haha... I have no idea where I am...
The growth of trade was important because it meant that neolithic people could improve our creations using unique resources that we wouldn't have otherwise.
Trading and traveling to different places also meant that neolithic people could connect to people from different places, and spread our knowledge and ideas.