Refactored docs Order creation API endpoints updated for guest users #6086

Author: Sairam9519

src/guides/v2.2/rest/tutorials/orders/order-add-items.md

@@ -16,7 +16,7 @@ functional_areas:
 
 This article shows how to add a simple product, a downloadable product, and a [bundle product](https://glossary.magento.com/bundle-product) to the cart.
 
-This calls are performed on behalf of a customer, and the customer's token is specified in the [authorization](https://glossary.magento.com/authorization) header.
+These calls are performed on behalf of a customer, and the customer's token is specified in the [authorization](https://glossary.magento.com/authorization) header.
 
 ### Add a simple product to a cart {#add-simple}
 
@@ -421,45 +421,20 @@ For this example, we'll configure the Sprite Yoga Companion Kit as follows:
 
 {% endcollapsible %}
 
-This calls are performed on behalf of a guest-customer, and there is no need of token.
-
-### Add a simple product to a cart {#add-simple}
+These calls are performed on behalf of a guest-customer, and there is no need for a token.
 
 **Endpoint:**
 
 `POST <host>/rest/<store_code>/guest-carts/<cartId>/items`
 
-Cart Id is the quoteId recieved on quote creation.
+Cart Id is the quoteId recieved on [quote creation](https://devdocs.magento.com/guides/v2.3/rest/tutorials/orders/order-create-quote.html#create-guest-cart).
+
 
 **Headers:**
 
 `Content-Type` `application/json`
 
-**Payload:**
-
-```json
-{
-  "cartItem": {
-    "sku": "WS12-M-Orange",
-    "qty": 1,
-    "quote_id": "5JfSLCdQUP4gwmM4z8u74iuPa0kfkZ5l"
-  }
-}
-```
-**Response:**
-
-```json
-{
-  "item_id": 7,
-  "sku": "WS12-M-Orange",
-  "qty": 1,
-  "name": "Radiant Tee-M-Orange",
-  "product_type": "simple",
-  "quote_id": "27"
-}
-```
-
-Note: The payload and response is same for all products apart from quote id in the payload (Need to give the masked ID)
+Note: The payload and response is same as the logged-in customer for all product types apart from quote id in the payload (Need to give the masked ID)
 
 
 ### Verify this step {#verify-step}

src/guides/v2.2/rest/tutorials/orders/order-create-order.md

@@ -64,6 +64,19 @@ When you submit payment information, Magento creates an order and sends an order
 
 An `orderID`, such as `3`.
 
+### Send payment information for guest customer{#send-guest-payment}
+
+**Endpoint:**
+
+`POST <host>/rest/<store_code>/V1/guest-carts/<cartId>/payment-information`
+
+**Headers:**
+
+`Content-Type` `application/json`
+
+Note: The payload and response is same as the logged-in customer for sending payment information.
+
+
 ### Review the order as an admin {#review-order}
 
 When you request an order object, the response contains full details about the order, including customer information, payment details, as well as totals and subtotals for the order and each individual item.
@@ -1573,17 +1586,6 @@ Not applicable
 
 {% endcollapsible %}
 
-### Send payment information for guest customer{#send-payment}
-
-**Endpoint:**
-
-`POST <host>/rest/<store_code>/V1/guest-carts/<cartId>/payment-information`
-
-**Headers:**
-
-`Content-Type` `application/json`
-
-`Authorization` `Bearer <customer token>`
 
 
 ### Verify this step {#verify-step}

src/guides/v2.2/rest/tutorials/orders/order-create-quote.md

@@ -59,7 +59,8 @@ The response is the `quoteId`: `4`
 {:.bs-callout .bs-callout-tip}
 Some calls refer to this parameter as the `cartId`.
 
-### Create a cart for a guest customer {#create-cart}
+### Create a cart for a guest customer {#create-guest-cart}
+
 To create guest cart there is no need to pass the token in the header.
 
 **Endpoint:**

src/guides/v2.2/rest/tutorials/orders/order-prepare-checkout.md

@@ -98,7 +98,7 @@ Note that the cost for the `flatrate` shipping method is $15. The Sprite Yoga Co
 ```
 {% endcollapsible %}
 
-### Estimate shipping costs for guest customer {#estimate-shipping}
+### Estimate shipping costs for guest customer {#estimate-guest-shipping}
 
 **Endpoint:**
 
@@ -350,7 +350,7 @@ The available payment methods are `banktransfer` and `checkmo`. The customer wil
 
 {% endcollapsible %}
 
-### Set shipping and billing information for guest customer{#set-addresses}
+### Set shipping and billing information for guest customer{#set-guest-addresses}
 
 **Endpoint:**