Core keywords
What are the core keywords? In fact, the core keywords are the theme of your website, what does the whole website do, that is, what is the core idea of the website, and then they are summarized into several keywords. For example, for a website that provides website optimization services, the core keywords can be "website optimization", "website seo", "website promotion" and so on. Select 1 (1 is best, but not more than 3). For example, for the keyword selection of chemical fertilizer plants, there can be "chemical fertilizer", "chemical fertilizer company" and "chemical fertilizer supply", and 1 is selected as the core keyword of the website.
Where do you put the core keywords? Since it is the key optimization, it must be placed on the homepage of the website. It should be distributed in every position on the homepage of the website, and the key position must be in the title!
Extended keyword
Extended keywords are relative to core keywords. All keywords except core keywords are called extended keywords. Although it is not the core theme of the website, it is also related to this theme. Related keywords expanded by core keywords are usually not placed on the home page.
Target keywords and long tail keywords cannot be classified, but are relative concepts, which can be core keywords or extended keywords. Here are their specific concepts.
The target keyword is relative to the page. If you want to use which keyword to locate this page, then this keyword is the target keyword of this page, such as the home page, and the core keyword is the target keyword of this home page. To put it bluntly, it is the key word that forms the theme of a page.
What are long tail keywords? As the name implies, it is a long keyword, but some people are really searching, such as "what is a long tail keyword", "the difference between core keywords and target keywords" and so on. Very long, sometimes it may be a sentence. Long-tail keywords can be the target keywords of a page or the core keywords of a website, but a few people will do so, because the search volume of a single long-tail keyword is small, but some people are searching, but the sum of the search volumes of multiple long-tail keywords is huge. Therefore, when optimizing the page, it is not necessary to regard the long tail keyword as the target keyword of the page, as long as it appears properly in the article and is optimized properly! However, there may be long-tailed words with a large search volume, and there are certain special circumstances. Even if these words are long tail words, they have high value because of the large amount of search, and they can be used as the target keywords of a page; If the search volume is huge, it can be used as the core keyword of the website. Generally, these two situations are relatively rare.