A page view occurs every time a user's screen changes and loads a new EHQ page.
This measure of activity is good for understanding how many times a project page has been viewed and the information collected is available in reporting and shown on your visitors summary graph. Page views are slightly different from visits however.
Page views = total amount of times a page is loaded
Visits = amount of unique visits by individuals.
ie. a visitor could load a page five times and it would only count as one visit. It would however show as five page views.
Read this article to get further details on How site visits and visitors are captured in EHQ.