These statistics store distribution information about one or more columns on tables and views, you can read more about how statistics works from Microsoft documentation in the first link.
On this post I am sharing a lightweight query to determine last update statistics date for each user table on a database. Please note that objects with null values are objects without statistics.
the ones with
_WA_Sys names, are the ones generated automatically when you have enabled the
Remember that you can update them using the