To get the most recent data, refresh Power BI. This is slightly different depending on whether you're using Desktop or Service.
New data is available every hour. You can setup scheduled refresh in PowerBI Service to automate this.
- Select the workspace that contains your report.
- Open the datasets tab and select the refresh button.
- Refresh can take a few minutes.
- Sometimes it's also necessary to also refresh the report view.
- Select Refresh.
Refreshing (scheduled and otherwise) will only work for as long as your token is valid. Once expired you'll need to update the token for your report in PowerBI Desktop and re-publish to Service (You can simply replace your existing dataset and report))