Explanation
Automatic conversion of purchase requisitions into purchase orders is a process that allows you to create purchase orders automatically from purchase requisitions without manual intervention. The prerequisites for this process are:
The Automatic Purchase Order indicator is set in the purchasing data of the business partner master record, which means that the vendor is authorized for automatic purchase order creation.
A source of supply containing valid conditions is assigned to the purchase requisition, which means that there is an agreement or an outline agreement with the vendor that specifies the price and other terms for the material.
The Automatic Purchase Order indicator is set in the plant-specific purchasing data of the material master record, which means that the material is suitable for automatic purchase order creation.
References: [SAP Help Portal], [SAP Help Portal], [SAP Help Portal]

Explanation
A movement type is a key that determines how goods movements are updated in inventory management and accounting. When defining a new movement type, you can configure some of the following aspects:
The value string for account determination, which means that you can define which accounts are posted during the goods movement based on the valuation area, valuation class, account category reference, transaction/event key, etc.
The allowed transactions, which means that you can define which transactions (such as goods receipt, goods issue, transfer posting, etc.) are possible with the movement type.
The field control, which means that you can define which fields are mandatory, optional, or hidden in the material document for the movement type. References: [SAP Help Portal], [SAP Help Portal], [SAP Help Portal]

Explanation
A scheduling agreement is a long-term agreement with a vendor for the supply of materials or services according to a predefined delivery schedule. Some features of a scheduling agreement are:
A material master record is optional in a scheduling agreement item. You can use item category M (Material unknown) to enter a short text and material group instead of a material number.
A scheduling agreement can be used for a consignment process. You can use item category K (Consignment) to indicate that the materials are stored at your premises but are still owned by the vendor until you consume them.
A scheduling agreement item is always plant-specific. You must specify a plant for each scheduling agreement item and you cannot change it afterwards. References: SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 5, Lesson 1.

Explanation
The Procurement Overview app is a SAP Fiori app that provides an overview of the procurement activities and key performance indicators. You can personalize the app by using the following options:
Filter the contents of all cards according to a specific supplier, which means you can narrow down the information displayed on the cards based on a supplier name or number.
Use your user settings to define which cards to show and hide, which means you can customize the app layout by selecting or deselecting the cards that are relevant for you.
Use the drag-and-drop functionality to rearrange cards, which means you can change the order and position of the cards by dragging and dropping them on the app screen. References: [SAP Help Portal],
[SAP Help Portal], [SAP Help Portal]