At Google, we're aware of the importance and sensitivity of conversion event data to our advertisers. We take care to preserve the confidentiality and security of Google Ads conversion event data, and provide clear information about the limited ways this data is used.
What Google does with conversion event data
Google uses conversion event data for campaign performance reporting in your account, as an input for features such as Target CPA, and other conversion-based automated bid strategies, and in aggregate for the benefit of advertisers. It's Google's policy to restrict access to conversion event data, both inside and outside Google. Unless we have an advertiser's permission, we don't share advertiser-specific conversion event data with other advertisers.
When you track conversions, this conversion data will appear in your reports to help you make informed campaign management decisions. Reports containing conversion data are available through your Google Ads account and any linked manager accounts (MCC).
Google may also use conversion event data to improve your campaign performance. For example, Google provides Target CPA, an automated bid strategy that automatically optimizes your bids based on past conversion data, with the goal of improving your overall ROI. Google may use conversion event data to improve the performance of certain types of campaigns without requiring you to opt in. For example, Google may use app download conversion event data to stop promoting your app to a user who's already installed it.
Sharing monetary values along with your conversions isn't required to use Google Ads conversion tracking. Conversion tags can be placed on any page on your site and by default they measure distinct conversion events rather than monetary values. If you choose to send a monetary value along with your conversions, which can help you evaluate ad performance or be used in Target ROAS bidding, Google will protect and use that data as described in this article.
Finally, Google uses aggregated conversion event data for the overall benefit of advertisers. For example, features such as automated bidding and smart pricing rely on aggregate advertiser conversion event data to improve their overall quality and accuracy. If you're tracking conversions and your competitors are benefiting from some of these features, it's possible that your use of conversion tracking is indirectly affecting the cost of your clicks. Google may also publish conversion event statistics aggregated across many advertisers as a resource for the overall benefit of advertisers.
Security and privacy for website tracking
Google's security standards are strict. Google Ads only collects data on pages where you have deployed the associated tags.
Please ensure you're providing users with clear and comprehensive information about the data you collect on your websites, and getting consent for that collection where legally required.