When you copy and paste data from Google Sheets into Google Slides, you can create a link that can be updated at any time to show the latest data from the source you copied the information from. This allows you to keep your data synchronised across all files that the data is displayed in. 

Inserting data from Google Sheets

You can copy data from Google Sheets onto a Google slide as follows:

The data will be pasted onto the slide and show a Link icon when the data is selected. Click on this icon to see options to open the data source, unlink the data or view all linked objects in the presentation.

Although you can copy and paste text and images from Google Docs to Google Slides, you cannot currently link data to Google Docs, so that the slide updates if the original document changes.

Inserting charts from Google Sheets

If you have created a chart in a Google Spreadsheet, you can copy the chart into a presentation as required. Once pasted into a presentation, the chart can be moved or resized as required. 

You can also add a chart to a presentation using the Insert, Chart, From Sheets command.