The Platform Management page is where you can see the settings for your entire AutoLeadStar platform, from the group level, down to the product level. Your level of permission will determine at what level you are allowed to make changes.
If you have admin access at the group or dealership level, you are able to add new groups and dealerships by clicking the blue "+Add Group" and "+Add Dealership" buttons.
At the group level, you can make changes that affect your group as a whole. By clicking on the drop-down, you can change the group, if you have more than one group available.
In the dealership level, the changes you make will only affect the dealership selected in the drop-down and not any others. If you need to make a change to all dealerships, you will have to repeat that change with each dealership selected.
If you want to add a new dealership to your group, you can do so by clicking the "+Add Dealership" button at the top of the section.
The product section relates to any settings for the product selected in the top drop-down. These changes only affect the dealership selected at the Dealership level.