A freelancer is a person who works not as an employee of others, in a relationship of subordination, but offering his collaboration as a provider of a service and maintaining his managerial autonomy, doing remote jobs.

It is therefore a person who makes his knowledge and work activities available for various companies, without being bound by a permanent contract; the advantage lies precisely in the fact of being able to self-manage and being able to earn extra money at the end of the month, but this can lead to a real job, as long-term fixed collaborations can arise with some companies, while continuing to carry out some activities for other companies at the same time.

In recent years, the mass of freelance workers has grown all over the world, partly due to adaptation to the job market, partly as a consequence of the crisis, partly because lifestyles are also changing.

Obviously, since the freelancer is an independent and remote worker and is not bound by a traditional contract with the clients for whom he works, he will have to independently think about paying his own taxes, which vary from one country to another and consequently it is always good to find out about the legislation of the country where you work as a freelancer. 

Often agencies that deal with human resources are looking for freelancers to be able to include in the staff of the clients they work for, in fact you can be part of a list of freelancers that these human resources agencies will contact, in order to put them in contact with companies that require certain services. In fact, in the last years a lot of human resources agencies were contacted by companies in Florida, and thank to remote jobs, you can find work in Miami without living in the US territory.

Here is an interesting article that explains better this topic: https://www.investopedia.com/terms/f/freelancer.asp#:~:text=Key%20Takeaways,a%20better%20work%2Flife%20balance.