Websites you can only get in with a username and password, like email and cloud service accounts, banking sites, and even subscription-based online media restricted by paywalls.You yourself spend a lot of time in the Deep Web, but you probably do not know it. The main difference is that the Surface Web can be indexed, but the Deep Web cannot. So, what is the 90% that lies under the surface? Deep Web vs Surface Web

The reason search engines can see the surface web is through their web crawlers that read the website data, index it, and follow the links. It's the 'surf' of the ocean of the whole internet. Now, 4.5 billion pages is a lot, but you'd be surprised to know that in reality it's only 10 percent of the whole web. The section of the internet that is being indexed by search engines is known as the “Surface Web” or “Visible Web”. Some stats from from show at the start of November 2017, search engines have indexed at around 4.57 billion pages. If you think that search engines like Google (there are more!) know about everything on the internet, you'd be wrong. These three terms are often a source of confusion, especially in connection with cybercrime and where that comes from.

Is tor dark web or deep web