Which method should you use to implement and test broad match successfully on broad match campaigns to help analyse conversion data?

To implement and test broad match successfully and analyse conversion data, you should use One-Click Experiment Apply, which creates an experiment automatically following all experiment best practices. This method sets up a properly controlled A/B experiment — splitting traffic between your current keyword setup and a broad match version — so you can measure the actual impact on conversions with statistical confidence. Running an experiment ensures you see real conversion data from broad match without risking your entire campaign's performance.