Droplet is a combination of Servlets and javaBeans used while building ATG dynamo applications.
You can embed these droplets in your JSPs to display dynamic content. These droplets can be nested and pass parameters between themselves. These Droplets are also called as DynamoServlets. There are lot many out-of–box droplets provided by ATG.
The dsp:droplet
tag lets you invoke a servlet bean from a JSP page. It encapsulates programming logic in a server-side JavaBean and makes that logic accessible to the JSP page that calls it. Tag output is held by its parameters, which can be referenced by nested tags.