There are different names to this online jobs like micro jobs, micro task, short task, crowdsourcing etc.
Micro jobs are tasks that are short in nature & easy to solve.
You as a micro worker can work on these tasks & get paid for completing each task.
You can earn $0.05 to $1 for very small task like sharing & liking something on social sites, finding a contact details online, solving a captcha, review a product etc.
There are many tasks that can pay you even more than $5.
Though there are number of sites that provides short task but Amazon Turk is the biggest micro task provider. You can also check mTurk alternatives for making more income.