Website optimization, in general, even if he did a second check, the search engine will not not include at all. If the website has been online for a long time but the search engine still does not include it, there are only the following reasons.

Unstable website server used
In this time of money, many people unconsciously choose a foreign filing space to save time. This operation has a fatal impact on the development of the website. If you really want the website to develop and survive for a long time, you must ensure that the server can become stable. Because the unstable space will be very slow or even close to collapse when it is used, the experience of such a web page will be low, and it will only be closed in the end. This is not directly related to optimization. It is necessary to change a stable space as soon as possible.

Low originality
In fact, it is not completely right for search engines to say that they are robots, because search engines especially like original content. Therefore, many websites are very rich in content when collecting content, but the speed of being included is very slow. Generally, we need to update the website regularly, and the update must be original. Of course, it is also feasible to fake original without original, but at present, with the increasing intelligence of search engines, their ability to distinguish content is also growing.

Initially robots are set to not allow fetching
Normally, new stations that have just launched will have robots file settings, which are all to prohibit Baidu spiders from crawling. However, when the new station is really online, the ban will be lifted, so if it is set and not lifted, the search engine will certainly not be able to capture it.

Used the domain name that was punished
Many people like to use the old domain name for convenience and time saving. Of course, we also know that the old domain name also has a certain advantage in the website ranking. If the old domain name has the right, and your content is similar to the content of its website, this time it is quite conducive to your website ranking, but to go home, If an old domain name has ever been punished, the result will be the opposite. If you choose a suitable domain name, but it has been registered, you need to be vigilant and go to Baidu to check the record.
So, if your website has been put up for a long time, but still has not been included, see if your website has these problems.
Information source of this website Shangpin China Website Construction Company :  //ihucc.com , Beijing website design, Beijing website production company