user_seeks user_scans user_lookups user_updates

 

https://blogs.msdn.microsoft.com/craigfr/2008/10/30/what-is-the-difference-between-sys-dm_db_index_usage_stats-and-sys-dm_db_index_operational_stats/ 

 

https://docs.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-db-index-usage-stats-transact-sql?view=sql-server-2017

 

https://www.red-gate.com/simple-talk/blogs/a-quick-look-at-dm_db_index_usage_stats/