You can hove text in Google Sheets using tooltips. You can add a tooltip in Google Sheets using the built-in Comments and Notes features. The Notes feature allows you to display a simple annotation (or tooltip text) over a cell value, while the Comments feature lets you start a conversation with other users who share the same spreadsheet. The difference is, when you use Comments to insert a tooltip, your name and profile picture will be displayed along with the tooltip, while with Notes, nothing except the tooltip text will be displayed.