All of the solutions on these pages are in "portable document" format (i.e., they are .pdf files). It is likely that your web browser has a plug-in which allows you to view such files. In this case, you can just click on a link to a file, and your web browser should just open a window in which you can view the document.
If you don't have the necessary plug-in, then when you click on a link to a file, your web browser will ask you if you want to download the file. In this case, you should download the file to a location that you will remember. You should then get Adobe's Acrobat Reader, which you can download for free from the Adobe web site. You can then use the Acrobat Reader to view any of the .pdf files that you have gotten from this website.