https://www.phdata.io/blog/how-to-optimize-snowpipe-data-load/#:~:text=Snowpipe%20is%20typically%20used%20to,data%20within%20one%2Dminute%20intervals.

For optimizing the performance of queries that run on a very large table, it is recommended to choose one high cardinality column as the clustering key. This helps to co-locate similar rows in the same micro-partitions, improving scan efficiency in queries by skipping data that does not match filtering predicates4.

In Snowflake, reader accounts are special types of accounts that allow data sharing with external consumers without them having their own Snowflake account. The creation and management of reader accounts can be performed by users with the ACCOUNTADMIN role or the ORGADMIN role. The ACCOUNTADMIN role has comprehensive administrative privileges within a Snowflake account, including managing other accounts and roles. The ORGADMIN role, which is higher in hierarchy, oversees multiple accounts within an organization and can manage reader accounts across those accounts.
:
Snowflake Documentation: Creating and Managing Reader Accounts