[Home](./index.md) > [@firebase/database](./database.md) > [setPriority](./database.setpriority.md) ## setPriority() function Sets a priority for the data at this Database location. Applications need not use priority but can order collections by ordinary properties (see [Sorting and filtering data](https://firebase.google.com/docs/database/web/lists-of-data#sorting_and_filtering_data) ). Signature: ```typescript export declare function setPriority(ref: Reference, priority: string | number | null): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | ref | [Reference](./database.reference.md) | The location to write to. | | priority | string \| number \| null | The priority to be written (string, number, or null). | Returns: Promise<void> Resolves when write to server is complete.