"Web analytics tools do not measure time spent for visits with only one page view, as measuring time spent requires at least two page view events that act as 'markers.' Workarounds exist, such as triggering a collector tag at regular intervals within the same current page, but these are not recommended because: 1) they exponentially increase the volume of collector hits, thus increasing Client billing; 2) they can skew the calculation of other engagement metrics; 3) they can slow down the loading of site pages, negatively impacting conversion rates. Web analytics tools also do not measure time spent on the last page viewed of a visit, as the measurement of time spent requires start/end markers characterized by page view events. By nature, the last page viewed in a visit is not followed by another page view. Additionally, the last page viewed marks the start of the 30-minute inactivity period that leads to the calculation of the visit's end. However, some web analytics tools allow considering an action performed by the user on the last page viewed as an event that triggers the 30-minute inactivity period and use this action event as the final 'marker' for calculating time spent on the last page viewed."