*The version of Laravel...5.8, PHP...7.1.3 When you create migrations in Laravel, you need to set columns that store timestamps ("created_at", "updated_at", "deleted_at").
It creates "created_at" and "updated_at" automatically and these columns can store NULL. You also can set name for a single column for timestamp like as below. Make sure to use "timestamps()"(plural) to set "create_at" and "updated_at" at the same time, and for a single column, use "timestamp()"(not plural).