The main feature of this type of tags is that they do not have display content, are located in the HEAD section and can contain any additional information for automatic web processing by clients -
browsers, robots, specialized
According to the purpose of the information provided, we can conventionally identify the most widely used groups:
- * Information about the document: authorship, sources, etc .;
- * Information for search robots: keywords, short description, and etc .;
- * Instructions for browsers: code pages, cookies, automatic update intervals;
- * Instructions for specialized software and various services, for example - indication for programs of parsers of the address with a copy of the data of the page prepared for machine processing.