Users and items can have their metadata stored in SuggestGrid.

These metadata can be used when the results wanted to be filtered or when the results are asked to have their specified fields in responses.

Metadata are shared across all types. They must be associated with user ids or item ids.

Metadata objects must have an id field and cannot have more than 1000 fields.

The metadata shared with SuggestGrid can be used to add filters to your queries, and responses with fields already associated in your responses.

In case there isn't enough action sent to SuggestGrid, metadata can be used to answer recommendation and similarity queries for solving Cold start problem.

The next article advanced features is on how to make use of metadata in your queries and more.