CSS description types stands for cascading style sheets. Cascading style sheets is a style sheet language used for describing the presentation of a document written in a markup language. (www.Google.com) Their are three types of CSS styles which are external, embedded, and inline. I think that it depends on how you use external, embedded, and inline to get different types of pros and cons. What i’m saying is my pros and cons may be different from your pros and cons. External is a file that contains only CSS code and is saved with a CSS file extension. (www.Google.com) For example if I wanted my webpage to have a red title head then I have to make sure that it's wrote like bgcolor=#FFFFCC. The pro with this could be when writing the code right you get the right color that you would wanted. Other may say “I like using external because I think that's it is very simple to use.” A con could be someone not putting the code in right and getting the wrong outcome. Some people may say “I don't like using external CSS because it does not work for me.” Now embedded CSS is a linked style sheet with a text file that has the extension.CSS. (www.le.ac.uk/oerresources/bdra/html/page_32.htm)-Defining an Enbedded Style Sheet. I feel with embedded you have to make sure that your pages link and also make sure that the style that you choose is linking with the different pages. If I was to visit a web page and clicked on pictures but it did not link to that page then it would not be right. Whatever type of style you would like. Pros and cons of embedded are that you can link all the pages together. (pro) All the pages may not link together with the correct style no matter how hard to try. (con) Last but not least you have inline. Inline style sheet applies only to what's within that line. This could be wrote like The Children are Happy. This is letting the paper know that the children are happy is the title. Pros and cons of online would be that this not hard to do at all I really love trying different types of codes. I think that this is the most easiest one of them all. (pro) I hate using inline because if you don't have the code right within that line then you won't get the correct outcome. (con) These are just opinions about how I feel when using external, embedded and Inline. Please do not get offended by what I have said.