Advantages of keyphrase and keyword

A keyword is a single word which may be used in a search engine to find material on the Internet. A keyphrase is a collection of words which may be typed in. For example, see this search for any occurrences of 'keyword and keyphrase' anywhere in MyLot: http://bit.ly/PzUbSC On the other hand, if you wished to search the whole Internet for the phrase 'keyword and keyphrase', you might do this: http://bit.ly/PzVKjd