Web services are an easy way for applications to use the web. They are a way to use web technologies to provide an application programming interface (API). This is different from the purpose of a web page, which is a user interface (UI) intended for use by a human user. Web services open up a whole new world of possibilities because now any application can take advantage of web technologies, not just web browsers.
This video explains how the web is based on the Hypertext Transfer Protocol (HTTP) and why this is important for web services and web pages. Web pages use HTTP to retrieve web pages using Hypertext Markup Language (HTML), which are then displayed in the browser. Web services use HTTP to exchange raw data, with JavaScript Object Notation (JSON) being the most common data format.

00:00 Introduction
00:16 What is the web? What is the Internet?
00:55 The web in a nutshell
01:18 Difference between website and web service
02:12 How do websites and web services work?
03:35 Examples of web services
04:47 A brief history of web services
05:51 Summary

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