"facets" are things you want to search for where text search doesn't work, usually some numerical measure
example: "latest", "number of comments", "number of tags" - and often let you specify a range
or they can be some metadata about the post - edited, contributed by, creative comments license
So things like "rust", "elasticsearch" don't belong because they are text searchable
Ebay website is example - Stuff like "counry of manufacture", "price range", "media type"
"facets" are things you want to search for where text search doesn't work, usually some numerical measure example: "latest", "number of comments", "number of tags" - and often let you specify a range or they can be some metadata about the post - edited, contributed by, creative comments license
So things like "rust", "elasticsearch" don't belong because they are text searchable
Ebay website is example - Stuff like "counry of manufacture", "price range", "media type"