Imagine eating a bowl of cereal and there's no placement, how would you deal with the kind of mess you make on the table? Wouldn't it be a laborious not to mention annoying task every time you have your food? The same principle can be applied as to why you need a rolling tray for prepping your joints.

However, the most compelling reason behind getting a rolling tray is that they are designed in a way that will make the procedure of rolling so much easier. The high edged sides along with the edges enable you to collect the herb towards the center.

This is what basic rolling trays can offer. You can even get hold of rolling kits with accessories/attachments that will make the process of rolling way easier.