How to publish your add-in on Office store
You can upload your app for SharePoint to either the public SharePoint app store or to an organization's private app catalog. A private app catalog is a dedicated site collection in a SharePoint 2013 web application (or a SharePoint Online tenancy) that hosts document libraries for apps for SharePoint and apps for Office. Putting the catalog into its own site collection makes it easier for the web application administrator or tenant administrator to limit permissions to the catalog.
If the app is uploaded to the public app store, Microsoft runs some validation checks on it. For example, it checks whether the app manifest markup is valid and complete and verifies that any SharePoint solution packages (.wsp files) that are included do not include disallowed elements or Features with a scope broader than Web. The content of the package is also inspected for objectionable content. If the app passes all tests, the app package is wrapped into a file and signed by Microsoft.
Uploading an app for SharePoint to an organization's app catalog is as easy as uploading any file to a SharePoint Foundation document library. You fill out a pop-up form in which you supply the local URL of the app package and other information, such as the name of the app. When the app is uploaded to an organization's app catalog, similar checks take place and apps that do not pass are marked as invalid or disabled in the catalog.
Tenant administrators and SharePoint 2013 web application administrators can shop for apps for SharePoint on the public app store. To open the public app store, the administrator selects Add an App on the Site Contents page and then selects SharePoint Store in the Your Apps page. This opens a SharePoint Store page that the administrators can use to discover and learn about apps for SharePoint that vendors are offering. Apps that require a prerequisite that is not installed on the administrator's web application or tenancy appear dimmed and are unavailable in the app store. For example, if an app requires Search Services and this is not installed, the app appears dimmed. Administrators can sort, filter, and browse the list of apps, read about the apps, see app reviews, and purchase licenses for an app.
When an administrator decides to purchase a license, she must accept the terms and conditions of purchase and agree to the permissions that the app must have in order to execute, such as read access to lists or full control access to the site collection.
When one or more licenses for an app are purchased, the licenses are downloaded to the web application or tenancy. The app is not automatically downloaded and installed when the license is purchased, although administrators have the option to combine installation with license purchase. Users install apps from the Your Apps page. This page has a merged listing of the following:
Apps for SharePoint from the web application's (or the tenant's) organization app catalog.
Apps for SharePoint from the public app store for which the organization or tenant already owns a site license or a license which has been assigned to the user.
Users can filter the apps included on the page to include only apps in the organization's app catalog. When an app is installed, it appears in the list of apps on the Site Contents page of the website to which it is installed.