12. The top-level Internet domains .com (commercial), .net (network) and .org (organization) , .edu (education), .gov (government), .mil (military), .pro (professional) , .info (information), .biz (businesses)
13.
14. A keyword doesn't have to be a single word - sometimes it can be a phrase.
15. Some keywords will come directly from the assignment topic (topic words). Other keywords will be closely associated with the topic (synonyms and/or related concepts).
20. The query includes not only information about "what" the site visitor is searching for (such as keywords, a business category, or the name of a consumer product) but also "where" information, such as a street address , city name , postal code , or geographic coordinates like latitude and longitude.