What is app in salesforce

Question

Hi, I was up to creating Visualforce pages, apex classes triggers, etc. I want to know what an app is in Salesforce and how to publish it on AppExchange?

Basically, I want to know what an app contains?

Answer 1

An app in Salesforce is nothing but a container which contains a name, logo, and some set of tabs. An app helps to grouped things up together visually. You can have same tab in multiple apps. 

I hope this will help.

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