After making the above changes, short-term problems may arise due to the lack of synchronization between indexing and the site status. For example, the old resource is already redirecting users to the new one, and it has not yet received the status of the main mirror in the search results. Therefore, the site may disappear from the index for a short time, and it will take a certain amount of time to restore positions. Problems may also arise due to incorrect gluing of mirrors. Positions sag due to the fact that the link weight is transferred to a non-existent site.
A web resource may not work for various reasons, but most often it is caused by:
scheduled hosting update or emergency server failure;
late payment for hosting or domain.
Viruses also pose a serious threat to the functionality jiangsu cell phone number list of a website. DDoS attacks are especially common, which consist of "collapsing" the access channel to the resource by creating an excessively high load.
The site code can be affected by viruses in the same way as programs on a computer. Search engines mark such resources, informing users about the threat:
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Obviously, such a message dramatically reduces the number of transitions. If the site owner does not take prompt measures to cure the virus, the resource may be completely excluded from the search engine index. After you cure the site, it is recommended to inform Yandex about it if it has marked it as dangerous. The message is sent through the Webmaster panel. The faster the described actions are taken, the less likely the site will fall out of the index and its positions will drop.