Microsoft Invest - Pass custom macros to a split

The split custom macro is used to pass any value to a creative landing page URL where the split will serve.

For example, suppose you set a custom macro for a split by defining the key as "color" and the value as "red". If you have a macro called ${color} within the creative's landing page URL, Microsoft Advertising will replace it with a "red" value. Before you begin passing custom macros, you need to first add custom macro keys to your creatives' landing page URLs when editing a creative or line item.

1. Select the Use Custom Macros checkbox.
2. Click the pencil icon in the Creatives > Custom Macro column for the corresponding split.
3. In the Edit Split pane, click the Setup tab.
4. Under Pass Custom Macros, enter the macro name as the key and enter the value that you want to serve on this split.
5. Click Add Another to add another custom macro or click Apply to save your changes.