Domain-specific modelling is a way to create computer models that are tailored to the specific kind of task you want to do. For example, if you want to create a computer program that helps scientists study the weather, you would need to create a model that is specific to the way the weather works. This type of model includes things like how different weather patterns interact and how changes in temperature, wind, and other parameters affect each other. By creating a model that is specific to the task, you can make sure the computer program is accurate and helpful to scientists.