| long-tail keyword | Long-tail keywords are longer and highly specific phrases with more than two words and less competitive in SEO and SEM. Such keywords help better ranking for highly competitive entities. |
| search engine penalty | The negative impact on a sites rankings after a search engine changes its ranking algorithms. |
| negative seo | A rare but malicious practice where webspam techniques are used to harm the search rankings of another website, usually a competitor. |
| search engine spam | Pages that are created to deceive search engines to give inappropriate or non-relevant content because of a keyword search. |
| pay-per-click | or PPC: Online advertising approach that determines the cost of an ad by the number of people who click on the ad. |
