What's the difference between save() and associate() methods in Laravel?

Question

Laravel

What's the difference between save() and associate() methods in Laravel?

Answer 1

save saves the model, associate is used to save the BelongsTo connection and is called not on the model itself, but on the result of the relation method.

Answer 2

"When updating belongsTo relationships, you can use the associate() method. It will set the foreign key on the associated model." I think associate just makes a selection, and save is already a save procedure in the database.