After your event organiser has provided you with your Exhibitor log in details, go to my.showgizmo.com and log in.
Click on the event you are attending.
From the menu on the left, click on Exhibitors, then click on your company name on the Exhibitor list.
To update your company details, click on Edit on right side of the screen. Here you can add your company logo, website details, add your Exhibitor bio and manage the primary contact details. Once you are happy with your changes, click on Save Changes at the bottom.