Tag Name
This is pre-populated with the page element name in the Layer panel. If you change the Tag Name it will update the object name in the Layer panel.
Tag Type
Image elements can be tagged as:
Image - This is the standard option for image automation
Dealer logo - If the image box is for a dealer logo, select this option
Tag Order
After the document re-sizes, there is an order with which each element of the artwork will re-size. This is important if elements need to re-size in relation to each other for example you may want the Logo to be positioned first and then the headline align to the new logo position.
You can effectively stack multiple tagged objects by assigning a number for each tagged object: