Page speed has become important because Google is now taking it as a factor in how high up your web site lists in search results. 80% of the time taken to download a page is taken up on the visitors browser, not the server.
Page speed is a measurement of how fast your web page downloads in a browser. It is calculated using over 20 different criteria. Both Google and Yahoo! have their own page speed tools for measuring web sites. Of course it is also very important for your visitors to view fast pages. No one will hang around a web site with a slow downloading web page.
There are many ways you can improve the speed of your web pages. Some are easier than others to implement. Here a few ways: