Final answer:
A high Bounce Rate on a site could be caused by extra Event Tracking on the landing page, ads that set different expectations, and having only one page on the site.
Step-by-step explanation:
A site might have a high Bounce Rate for several reasons. One reason could be that the landing page of the site has extra Event Tracking implemented to track additional actions besides pageviews. This can make it difficult for users to navigate the site smoothly and can lead to them leaving without exploring further. Another reason could be that the ads that bring the users to the site set different expectations than the landing page. If the ads promise something different from what the landing page delivers, users may quickly leave. Lastly, if the site only has one page, like a simple blog, users may not find any reason to stay and explore further, resulting in a high Bounce Rate.