Increasing the visibility of a company’s website in search engines, either through optimising website content and design to have the site organically picked up by search engines, or by paying to have the website listed as a sponsored link. SEM includes search engine optimization, paid placement and paid inclusion.

In general, the more frequently a site appears in the search results list, the more visitors it will receive from the search engine’s visitors. SEO may target different kinds of search, including image search, local search, video search and industry-specific vertical search engines. This gives a website web presence.

See also:
Search engine ranking
Tagging
Cost per acquisition (CPA)
Cost per click (CPC)
Reciprocal links
Ad rotation
Ad impression
Behavioural Targeting
Contextual Marketing
RSS
E-Marketing
User Session
Deep Linking