Magento models, resource models, and collections

Every Module of Magento Uses Model,Resource Models and Collections.But some time we get confused between this so let's understand in simple way 

 

A “model” is used to store data, and perhaps performs some business logics against that data.so we create model in every Module to Write some Business Logic

A “resource model” is used to interact with the database on behalf of the “model”. The “resource model” actually performs the CRUD operations.

A “collection model” holds from one to many “models” and knows how to tell the “resource model” to get rows in the basis of information it is given.

There’s a basic ActiveRecord-like one-object-one-table Model, and there’s also an Entity Attribute Value (EAV) Model.

Hope this will Help you!