Creating a 3D model of an exhibition booth before building it offers advantages such as better visualization of the final product, greater flexibility in design and customization, time and cost savings, and better marketing opportunities. The 3D model allows designers and clients to see the booth in three dimensions and make adjustments as needed, resulting in a more accurate representation of the final product. This can also help identify potential issues or design flaws before construction begins, leading to more efficient use of resources and faster project completion times. Furthermore, the 3D model can be used to promote the booth to potential clients or stakeholders, generating excitement and interest and leading to increased attendance and better marketing opportunities.