The web pages that Google shows on the first result page for your query contain a lot of information that can help you to improve your own web pages. If you want to improve the rankings of your web pages for your keywords, taking a closer look at the result pages can help you a lot.
Google's ranking algorithm uses a variety of different factors. Some of them are obvious by analyzing the top ranked pages. Search for one of your most important keywords and then take a look at the search results: