سؤال فى allow_row_locks

It means that the database engine could lock the row when doing some operations on the index that require either modifying the indexes (i.e. adding data to the table) or the or one of the dimensions that the query plans are refreshed on

In the past, it was always a table lock, now there's an ability of having row lock

The question of whether my row will be locked or not, is based on the operation you're performing.