Anyone can put whatever information they want on the internet. No reliability label or quality control for websites exist. Hence, be critical of websites that provide little to no information on their objectives or on the authors, especially when looking for scientific information.
Apart from that, also be well aware that search engines do not direct you to all information on the web. A lot of scientific information is hidden to a great extent from search engines and is located in restricted databases that can only be accessed upon payment (cf. the deep or invisible web).
In this chapter we treat a number of criteria that can be used to assess the quality of information on the web.