IVION Instance: An instance is an individual copy of the NavVis IVION software running on the server, which you can open through a dedicated URL. In one instance, you can have multiple sites.
Site: A site is a grouping of Datasets and users. Datasets are added to an individual site, and each site has specific user permissions and a unique URL. The processing and set up workflows take place at the site level and datasets cannot be moved between sites afterwards.
A NavVis IVION instance is a copy of the NavVis IVION software running on a hosting server. An instance has a database which contains the associated datasets, users, and more. That data is accessible via the instance URL.
Site refers to a complex of one or more buildings displayed in a NavVis IVION instance. For example, the Munich Airport would be one site. An instance can contain multiple sites. Each site consists of one or more datasets.
A dataset is a piece of a site, the result of a continuous recording with a NavVis mapping device or the result of an imported point cloud. Datasets can contain panoramic images and point clouds.