Each gTLD carries a slightly different meaning, so it’s usually best to pick one that’s most relevant to your website.
Domain names ending in .com are commonly used for commercial purposes, although they’re becoming the default option as they imply a certain amount of trust. .net domains were originally used by networking companies, such as internet service providers, but are now multipurpose.
Domains ending in .org are still largely used as originally intended – as the gTLD for charities, communities, and local organizations. Meanwhile, .info is aimed at information-based websites such as wikis and tutorial sites.
With all of these gTLDs, there’s a certain amount of wiggle room. There’s no rule saying you have to use one type of domain name or another. Think of the above information as guidelines.