The Google Chart API is a very simple tool that allows you to create a chart from the data given and then it can be embedded in a web page. It can dynamically generate the charts. All you got to do is embed the data and the formatting parameters in a HTTP request. The Google will return a PNG image of the chart. Various types of charts are supported and by just making a request into an image tag, you can include the chart in a web page.
But incase you just had only few outcomes and you wished to show a simple chart in your web page to the users of your website or blog, then you might get stuck in some situations due to some of the following reasons- use of an HTML, only website or blog that does not allow server side scripting, lack of knowledge of using a chart framework even if you had a server side scripting, burden of the process in creating a simple chart or simply wasting time.