Our world is versatile with several subject matters of interest. A single PiXeL Grid or AD Canvas (Co-location Canvas (CLC)) to advertise this diversity, would result in a chaotic clutter of advertisments, so we thought about categorising this diversity into advertisement categories. A PiXeL Grid or AD Canvas (Co-location Canvas (CLC)) is exclusively setup for a particular subject matter eg. Music, Movies, Beauty, Treatments, Homestay, Properties ... These categories are setup as subdomains as how you can see in http://movies.pixelads.in Sellers belonging to a subject/category can advertise on the PiXeL Grid or AD Canvas (Co-location Canvas (CLC)) for that category E.g. On a PiXeL AD Category for 'Movies' www.movies.pixelads.in, you can find advertisements on new release movies, theaters, directors, movie companies, movie distributors, supplies, celebrity profiles and everything else about this subject of 'movies'.