An easement refers to a person's right to use or maintain another's piece of land for a single purpose without assuming ownership. Some common examples are running underground cables and utilities, granting a path for land not bordered by any roads to reach one, and undeveloped lands retrofitted for recreational use.
The difference though, between an easement and outright ownership, is simple. An easement limits a person's interest to do anything they like with the property, nor allow hem to reside on it. In the easement, it'll detail exactly what's allowed to happen on the plot until termination. Here's 3 other things you didn't know about easements that will help you out as a land owner.