Grouping keywords

Managing and optimizing a large number of keywords can be a daunting challenge and it requires grouping for logical mapping to specific web pages once our initial keyword research is completed.
Every website has at least 5-10 "main keywords" which can answer this question: "What is this website about?" The rest of the keywords are called secondary keyword and will be some variation of those main keywords whether lexically related or directly stemmed from the main keywords.

Types of keywords:

• Main keywords: These are usually one-two words in length, and all the other keywords either stem from them directly or are lexically related phrases, misspelled, or plural forms. A few examples of main keywords phrases are: "loan,""real estate,""lawyer," "DVD,""cell phone" etc. Although trying to get high ranking for these terms would be a futile attempt, nonetheless they are still required to be inserted into a website's title, body text and many other potential HTML tags for effective optimization.
• Secondary keywords: These are the keyword we really try to get top ranking for on the search engines; therefore, they require the most amount of research and filtering. The secondary search phrases are either stemming from the main terms or semantically related in singular and plural forms. The secondary phrases are usually 2-3 words in length, but they can be as long as 6 words in some cases. A few good examples of secondary keyword phrases are: "home equity loans," "low down payment loan mobile home," "best refinance home mortgage loan rate," "prepaid us sim cards," "international sim cards."