What is a security consideration when using thumbnail previews?

The correct answer highlights an important security consideration in the context of working with thumbnails, particularly in analytics platforms. Row-level restrictions are essential for maintaining data privacy and ensuring that users only see data that they are authorized to access. When a lens or dashboard is created that includes thumbnail previews, those previews might not enforce these restrictions until the user interacts with the dashboard or lens by clicking on it. This means that anyone who can view the thumbnails might inadvertently see sensitive information that they shouldn't have access to, if those access controls are not applied at this early stage.

The reason this answer is relevant in a security context is that it underscores the need for vigilance around what is displayed in settings where sensitive or private data is involved. Proper security practices would involve ensuring that only appropriate summaries or visuals that don’t expose sensitive information are previewed until specific interactions warrant that deeper data access.