# WebForms ToolTip Overview

Both **RadTooltip** and **RadTooltipManager** can display rich content (including user controls and other ASP.NET controls), as well as AJAX-generated content. **RadToolTip** is meant to "tooltipify" a single element while **RadToolTipManger** should be used in scenarios where many elements would require a tooltip. For more information on **RadTooltipManager**, see the [RadToolTipManager Overview](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/radtooltipmanager/overview) topic.

#### Key Features

The two most common **RadToolTip** properties are:

* [TargetControlID](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/radtooltip/using-the-targetcontrolid-property)**:** the ID of the control for which the tooltip should appear on the client

* [IsClientID](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/radtooltip/using-the-targetcontrolid-property)**:** True if the TargetControlID is a client id.

## See Also

* [Online Demos](https://demos.telerik.com/aspnet-ajax/tooltip/examples/overview/defaultcs.aspx)

* [ASP.NET AJAX ToolTip](https://www.telerik.com/products/aspnet-ajax/tooltip.aspx)

* [Using the TargetControlID Property](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/radtooltip/using-the-targetcontrolid-property)

* [Managing Content](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/radtooltip/managing-content)