Copywriting is a broad area that comes down to writing texts for various tasks. You can write advertising articles and notes for websites, product descriptions for marketplaces, posts for business accounts on social networks.
Moreover, these can be either unique materials, written from scratch, or processed, rewritten according to a sample – this is called rewriting.
There are entire copywriting agencies that are looking for employees, but you can also work as a freelancer if you have a base of potential clients. The main advantage of copywriting is the ability to work remotely and at any time. You can also learn this craft remotely – there are many paid and free courses online, both for beginners and advanced authors.