Directory
Directories are compiled lists of sites, categorized and organized by topic. Each directory listing contains short, descriptive information about the site. Directories are compiled by human editors who approve listings.

Keyword (or key word phrases)
A single word or phrase (like “travel” or “travel guide”) prospects would type into a search query box to find products and services like yours. Keyword is commonly used to replace “keyword phrase” Optimising a site for one word only is not recommended due to the enormous competition. For example “Travel Guide” or “Travel Overseas” would give you a better chance to compete with.

SEO (or SEM)
A form of online marketing, search engine optimization (or search engine marketing) is the process of making a site and its content highly relevant for both search engines and searchers. Successful search marketing helps a site gain top positioning for relevant words and phrases.

Search engine optimization writing
Search engine optimization writing is specialized copywriting that entails weaving keywords and keyphrases into marketing or informational copy. The purpose of search engine optimization copywriting is to gain prime positioning for the desired keyphrases, as well as increase page conversion rates.