When auto-tagging of Microsoft Click ID (MSCLKID) is enabled, Bing Ads will automatically add a unique click ID to the landing page URL. This click ID will be included in all subsequent UET events fired whenever the same customer visits your page, thereby allowing you to track the conversion from this customer on your site.
As of December 11, 2017, Bing Ads automatically enables Auto-tagging of Microsoft Click ID when you create a new conversion goal. You may, however, have older conversions goals in which Auto-tagging of Microsoft Click ID is not yet enabled. Below, you can learn the benefits of Microsoft Click ID and how to enable it if you haven’t already.
Auto-tagging of Microsoft Click ID is a conversion tracking component and useful way to discover what happens after someone has clicked on your ad. Once the UET tag is installed by the advertiser across their website, the tag reports user activity including the Microsoft cookie on the advertiser website to Bing Ads. Bing Ads uses the data sent by UET to find a match with the conversion goals created by the user, which counts as a conversion. In some cases, the Microsoft cookie is not available due to browser setting (i.e. 3rd party cookie blocking) or browser type (i.e. Safari) and causes conversion loss. Enabling auto-tagging of Microsoft Click ID can help to ensure conversions are accurately tracked in these situations.