In the Title tags section of the Web search engines interface, it is possible to define the tags search engines display next to topic and document titles when crawlers index content in the Reader page.
Tags appear in the order they are declared and are separated by hyphens as follows:
Document title - Metadata value 1 - Metadata value 2 - Etc.
It is possible to reorder the metadata by using the up and down arrows or dragging and dropping them.
The Title (topic or document) option is mandatory.