Edit the tab icon and text
After you’ve added your entry form to tabs on Facebook pages you can go to the pages to edit the icon and text used for the tab icon on your Facebook page. By default this tab will use the text Giveaways & Promotions. Click on the button to the right of the tabs and then click on the pencil (edit) icon on the Giveaways & Promotions tab. This opens a menu (shown below). Select the ‘Edit Settings’ and a new layer will open for you to customize the text and image. On this layer you can change the text from Giveaways & Promotions to any text you want to use.
You can also upload your own image to be shown on your Facebook page for the tab. Images can be JPG, GIF, or PNG files. If the image is larger than 111×74 pixels, it will be resized and converted to fit in the space. The file size limit 5 MB.