Flynny

I am an asolute novice at 3d Printing and I'm struggling witt Cura. When I bring the .STL file in and I press the "slice" it comes up with this "Please review settings and check if your models: - Fit within the build volume - Are assigned to an enabled extruder - Are not all set as modifier meshes I have no idea what it means. Would there be anyone who would be so good h to explain it to me and what I have to do. I've been all over the Internet looking for an answer. Thank You