You can see the last time at which data was refreshed without having to visit the Data page.

Hover over the data when choosing a data source to see the last time it was updated. You will also see when it was created and by whom.

You can also hover over a column in the Data column to see when it was last refreshed. This popup will also show sample values from that column.

And lastly, you can hover over a column or column name in an answer to see last updated information.