Dynamic Keyword Insertion (DKI) follows specific capitalization rules based on the syntax used in your ad copy:
Capitalization Rules:
{KeyWord:Default Text} → Title Case (e.g., "Running Shoes")
{keyword:Default Text} → lowercase (e.g., "running shoes")
{KEYWORD:DEFAULT TEXT} → UPPERCASE (e.g., "RUNNING SHOES")
Keyword Format in Ad Group:
DKI mirrors the capitalization of the triggered keyword in your ad group.
Fix:
Use consistent capitalization in your keyword list.
Choose the correct DKI syntax based on your preferred formatting.