When will the Analytics tracking code send a pageview hit to Google Analytics?
Every time a user searches on a website
Every time a user loads a webpage with embedded tracking code
Every time a user adds an item to an online shopping cart
Every time a user clicks a video on a website
A pageview is defined as a view of a page on your site that is being tracked by the Analytics tracking code. If a user clicks reload after reaching the page, this is counted as an additional pageview. If a user navigates to a different page and then returns to the original page, a second pageview is recorded as well.
Read more here: https://support.google.com/analytics/answer/1257084#pageviews_vs_unique_views