Translations:Page Previews/40/en

The theory of impact for Hovercards is that they lower the cost of exploring a link. This should mean that users are less inhibited and more focused when exploring links. We should see that the overall links clicked + (non-accidental) hovers exceed the number of links clicked without Hovercards. This is what success looks like. There are also some indications of failure that we will look for: If you have Navpops enabled, Hovercards are automatically disabled. You will have to disable Navpops in order to experience Hovercards. This is an intentional decision to ensure that Navpop users' do not have their preferences interrupted. Note: for certain browsers, you might have to clear your browser cache first for the change to take place. Right now, Hovercards will either be turned on or off by a user. The option to turn them off lives in each hover event. So at each hover event, a user can decide that they are no longer interested. For logged-in users, Hovercards may be re-enabled from user settings. For logged-out users, Hovercards may be enabled by selecting the "Enable Previews" link at the bottom of the page.
 * How do we measure Hovercards performance?
 * hovers can be accidental - we need to measure normal dwell time in a controlled condition to ensure that the likely rate of accidental hovers is not too high. To give an example, if a user must dwell on a link for 250 msecs before a hover shows, then we would want to make sure that there are not a large number of users who tend to dwell on a link for more than 250 msecs without clicking it.
 * Hovercards could lead to fewer pageviews, because the user gets the information that they need from the preview- this is not a problem, but we want to make sure that the decrease (if any) does not result in significantly less editing or fundraising.
 * the % of hovers that result in a user continuing to the page is high - this would suggest that most people wanted to go to the page anyway. If this is the case, then the hover is likely just adding an unnecessary step. We expect some significant % of click throughs for hovers. It is ~60% on Android for a similar feature, but we expect it to be lower on desktop.
 * the percentage of users who disable Hovercards is low (given that users are aware on how to disable the feature) - this suggests that users enjoy the feature.
 * What if I have Navpops enabled by default?
 * How many options do I have in Hovercards preferences?