Google needs to generate, maintain and increase its revenue. It can only be done when the searchers uses Google as a Search Engine. The searchers will use Google till the time the Search Engine is providing accurate results to the query entered by the searcher. For example, Google rolls out a new ranking algorithm, and you need to add it to the list. You can create a list of the best tools for increasing productivity, or a list of the best books covering productivity topics. However, it takes many years of industry experience to notice trends and developments to help you find the right keywords and keyphrases.