Every business targets an audience defined by behavioural, psychological or demographical traits. However, 20% of such an audience represents 80% of the business (Pareto principle). Therefore, to increase the ROI of any business, marketing campaigns should focus more on delivering results from that 20%. To achieve such results in Google Ads, marketers can take advantage of the Rules feature. They can create an automated rule that increases the bidding by a percentage of choice (I recommend between 20 and 50%) when a pre-defined audience triggers the query (to create the audience, use the Audience Manager feature).