The Collections menu provides three tables of collections grouped according to their categories of Custom data, History & Logs, and System internal along with their name, description, type, and action. 

Prerequisites

To have access to the Admin's Collections menu, you have to be assigned to the Admin role or higher.

Proceed as follows

On the left navigation, expand the Admin menu and select Collections.
→ The Collections menu item is displayed. The three types of collections are grouped in tables, namely Custom data, History & Logs, and System internal. 

The tables provide the name and description of the collection, its type and available actions. Selecting the search icon from the Actions column takes you to the Data Explore menu:

Adding a new collection

You can add a collection using Add collection button at the upper right-hand area. Then you will be prompted to enter the following information in the Create New Collection window:

Details view

Selecting the name of a collection from a table, opens the Details view, which includes information about the Label, Technical Name, Description, and Type of the selected collection. The data from the Statistics refer to the number of documents, and the sizes of data, total index and storage:

Indexes view

Indexes provide efficiency while executing queries in MongoDB. When an application is repeatedly sending queries on the same fields, create an index on those fields for improving performance for those queries. If no indexes are created, MongoDB is scanning every single document in a collection and returns query results. If an appropriate index exists for a query, MongoDB is using the index to limit the number of documents for scanning.

Adding and removing index

To add new index use  Add new index button at the right-hand side at the bottom. Then you will be prompted to enter the following information in the Add new index window:

You can add index fields with button and reorder them later with  button. It is possible to remove an index using the remove icon only if the index is added successfully.