A domain name can sometimes provide clues about the quality of information of a site or tell you what a site is about. For example, you might find some information on a website that includes scientific information about climate change. However if the URL is www.climatechangeisfake.com, you would need to consider whether the information on their website is unbiased.
The extension can also includes clues about the type of organisation responsible for a website. Some common extensions are:
It is a common misconception that .org addresses are exclusively for not-for-profit organisations. This is no longer the case and any organisation whether they are for-profit or not can register a .org website address.