The document discusses how to perform better searches on Google by using keywords and filters. It recommends sticking to the topic when choosing keywords and provides examples of how to filter searches by file type (e.g. filetype:ppt for PowerPoint files), domain (e.g. site:uclan.ac.uk to search only a specific domain), or generic domain (e.g. site:.edu to search only education domains). The examples show how filters can refine search results to be more specific.