The point of Azure WebJobs is to carry out small background tasks within the context of your Azure App Service. The main advantage is that an Azure WebJob has access to or awareness of your App Service environment (files, logs, processes etc) to do pretty much anything you would like

With Azure App Service (Azure Web App), it is possible to modify the publishing model of the application from Code to Container after it has been published using the Azure CLI. The reason you may want to change to a Container based publishing model could be to take a step