Hornwort is one of the easiest freshwater plants to grow. This is demonstrated by its success in the wild where it has spread to every continent except Antarctica, after originating in North America. Its high tolerance to various water conditions makes it ideal for beginners, while its fast growth rate and ease to propagate means a little will go a long way.
One of the main reasons that people add hornwort is for its aesthetic. Adding plants to your tank increases the amount of color, whether it is at the top as a floating plant or grounded in the substrate.
It also gives your aquarium a new dynamic as it sways in the current. What people do not often consider is how it keeps your tank healthier.