The service best suited for quick, ad-hoc queries on data directly where it resides in simple storage on a web scale is Athena. The service enables users to leverage standard SQL to interrogate data sets, making it the ideal choice for immediate and straightforward analytics. In contrast, Redshift is tailored for complex analytical queries after data ingestion into its warehouses. Glue is utilized for data preparation and loading through an ETL process, and QuickSight primarily provides visualization and business intelligence capabilities. Kinesis is focused on real-time data streaming and processing, whereas Lambda caters to executing code in response to events and is not specifically designed for querying data stores.