Rename objects quickly! Use this operator to rename all objects inside a collection with the name of the collection plus an ascendant number at the end of the name. This is a lazy way of renaming things when you want to speed before precision
If you need a fast way to rename a group of objects then this is the best way, just make sure your collection has a good "base name" and then execute this operator:
Right click the container collection and choose "Rename by collection". All objects or collections (first level) will be renamed with the name of the collection plus a "_" and a sequenced number
Use this operator when building complex objects and you don't need very explicit names, for example if you are building a scene with some furniture that are going to be placed at the left of the scene you can call the collection "Furniture_Left" and when renaming all the objects inside they are going to be called "Furniture_Left_01, Furniture_Left_02...." etc.