What does Description mean?
A meta description is a short description of a web page in the HTML head. Search engines may use it as the search result text, but they can also select different text.
AN EXAMPLE IN PRACTICE
Where you might encounter it
For a service page, briefly describe the offering and its benefits in the meta description. Google may use this text or show a relevant excerpt from the page based on the search query.
Further sources
From NetzTurm Decode. Clear explanations with historical context.