This is where most people screw up. Articles and other content they put on their holiday, their work, their hobbies and their dog all in the same lens!
An effective lens should be focused on a particular topic. The tighter your niche, the better you make.
People on the Web are looking for very specific information, and if your lens is too wide, they will not hang around long.
For example, if you have a lens on to write "dog training", then keep everything on that page about dog training. Do not start adding articles about 'dog breeding’. Although it is quite closely related, it is another matter altogether. You could make another lens on "dog breeding".
