This help page describes how ‘Single page visits’ works as a metric. See the Single page visits dimension for more information.
The Single page visits metric shows the number of visits where the Page dimension item contained only a single unique value for the entire visit. This metric is helpful in the context of dimensions where you want to see short visits, but not have as stringent of a rule as Bounces does.
This metric counts the number of visits where the Page dimension item contained only a single unique value for the entire visit. If a visitor reloads the page or fires link tracking calls, it still counts as a single page visit. As soon as the Page dimension changes to a second unique value, the visit no longer qualifies as a single page visit.
See Single access for a comparison between metrics.
This setting specifies whether repeat instances are counted in reports. For more information see Count repeat instances.