You don’t hear (or read) the term “spamdexing” so often online these days. Not even on professional SEO sites. I always wondered why. It is quite a vague term, but its definition would help understand what black hat SEO really means.
Combining the terms spamming and indexing you get Spamdexing. The term defines all possible black-hat SEO techniques in the book: keyword stuffing, link spam, meta tags stuffing and so on. Black-hat SEOs are also called spamdexers. So if your purpose is to employ unethical means for fast SE rankings, you don’t need to hire an SEO but a spamdexer.
Probably the most annoying spamdexing technique refers to on-page keyword stuffing. Have you ever experienced a site where the text read something like: “welcome to the beach resorts Palm. Our beach resort is one of the best beach resorts in the country. Many beach resorts cannot compare with our beach resort…” etc. This technique worked. It doesn’t work anymore, because the search engines got smarter, but novice SEOs are slow learners. Some webmasters who employ DIY SEO techniques still read outdated articles and the results are disastrous for their sites.
Other pretty dangerous spamdexing technique refers at using trademarks in the meta tags to fool the search engines into indexing the site for highly competitive keywords and steal traffic from the competition. This is quite hard to beat, and the search engines cannot really understand that they are dealing with a form of spamdexing. It takes a human to see and understand the scam.