What is the meaning of the idiom "ins and outs"?

Complete details

The idiom "ins and outs" means complete details. It refers to the intricate details of something, especially the parts that are not obvious or easy to understand. For example, you might say "I need to know the ins and outs of the new software before I can start using it."

The other options are not correct. "Tactical moves" refers to the specific actions that are taken to achieve a goal. "Complex situations" refers to situations that are difficult to understand or navigate. "Entry and exit points" refers to the places where someone can enter or exit a place.