Keywords are divided into general keywords, related keywords, purchase keywords, short tail, long tail, main, auxiliary, popular, general, unpopular, alias, typo, time, question and answer.

Keywords, derived from English "keywords", are a vocabulary in library science, which refers to the vocabulary used by a single media when making and using indexes.

Keyword search is one of the main methods of network search index, and it is the expression of the specific name of the product or service or company that visitors want to know. Keywords can play an important role in many aspects, and can quickly locate something.

Keyword classification:

There are different kinds of keywords in different dimensions. Strictly speaking, we divide keywords into roots, stems and leaves.

Classify keywords according to tree rules and imagine keywords as big trees.

Assuming that the root is seo, then the stem is what seo is, seo tutorial, seo training and so on. What does the word seo mean, which seo training is good, and so on.

It should be pointed out that on the surface, the search volume of roots, stems and leaves should be from large to small, but in practice, the traffic brought by long-tailed words will be much greater than that of roots, which is commonly known as the 28 th theory.

The amount of root search is large, but the number of roots is limited. The search volume of long-tail words is small, but the unused subdivided long-tail keywords represent massive user needs. When these requirements come together, the total search volume will be greater than the root traffic.