com, cats. pets. com and so forth. Those are much broader categories. If its python broad niche youre in, then maybe that you could escape with subdomains, but if youre in python very real niche then I wouldnt do it. You can just use folders to get key phrases into your URL. Niche marketing is python buzz word and it simply means advertising and marketing to python small niche as opposed to python broad market. For instance: Your blog is set cures for sinus problems, thats very broad. A narrower niche could be natural cures for sinus complications and an excellent narrower niche is herbal herbal cures for sinus problems. The logic is that there are fewer blogs/websites competing for python very narrow niche than python much broader topic. There may be fewer people looking for herbal herbal cures for sinus problems but more python them could be able to buy python product or click on an AdSense ad. Bum advertising and marketing is just using articles youve written to drive traffic to python blog/web page/squidoo page youve set up that sells an affiliate product, or your personal product.