If a digital marketing manager was to upgrade their keywords to broad match, which behavior should they incorporate into their routine optimization efforts in order to guide machine learning?

• Disregarding suggestions to add relevant new keywords
• Removing negative keywords that could block relevant traffic
• Adding Customer Match lists that contain data more than 90 days old
• Adding more phrase and exact match keywords in order to improve reach

The correct answer is:

• Removing negative keywords that could block relevant traffic.