The Document-state meta tag can also be taken into account when indexing pages by search engines. Two values of the content - Static and Dynamic attribute are taken into account. The Static value indicates that the document is changed extremely rarely, Dynamic (by default) - the page is created on request and can vary depending on the additional query conditions. About long ago it was important, at the moment it's hard to imagine how the information from this tag can help a search engine perform a page analysis on a variety of parameters and using very complex and diverse algorithms.
< meta name = "document-state" content = "Dynamic" />