Offering specific online SEO services is also another online freelancer role that businesses are crying out for. If you know how to improve a website’s SEO by doing keyword research, creating content that can rank in search engines, adding metadata / schema to posts and pages, and building backlinks to a domain, to name a few tasks, then this could be a great line of work for you.
Mobile applications are more popular than ever, and people are willing to pay good money for ways to manage their lives from their smartphones. If you have a great idea and happen to know coding, you can run with it and create your app yourself. If you just have an idea and don't know the ins and outs of how to turn it into a reality, there are plenty of software developers looking to collaborate with people on app creation.