DOCSP-26830 - Clarify compound operations (#206)

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* fixes

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* fix

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Author: mongoKart

source/fundamentals/crud/compound-operations.txt

@@ -18,7 +18,7 @@ Overview
 In this guide, you can learn how to perform **compound operations**.
 
 Compound operations combine a read and write operation into
-a single operation.  If you perform a read and write operation
+a single operation. If you perform a read and write operation
 separately, there's a chance someone else may alter the document between
 both operations. MongoDB prevents this by placing a write lock on the
 document you are modifying for the duration of your compound operation.
@@ -44,7 +44,6 @@ Run the following snippet to load the documents into the ``tea.ratings`` collect
    :dedent:
    :start-after: begin insertDocs
    :end-before: end insertDocs
-
 .. include:: /includes/fundamentals/tea-sample-data-ending.rst
 
 .. _golang-find-and-delete:
@@ -58,10 +57,14 @@ the specified query filter and deletes it. The method returns a
 
 .. note:: 
 
-   This method differs from the ``DeleteOne()`` method.
-   ``FindOneAndDelete()`` performs a find and delete as a single
-   operation, and eliminates the possibility of someone altering a
-   document between both operations.
+   The ``FindOneAndDelete()`` method is an atomic operation, which means it prevents
+   any other write operations from changing the matching document until it
+   completes. The ``deleteOne()`` method is also an atomic operation, but differs from
+   ``FindOneAndDelete()`` in that you cannot specify a sort order for the
+   matched documents. 
+
+   If you don't need to find and delete a document in a single transaction, you can call 
+   the ``findOne()`` method followed by the ``deleteOne()`` method. 
 
 Modify Behavior
 ~~~~~~~~~~~~~~~
@@ -141,11 +144,15 @@ document.
 
 .. note:: 
 
-   This method differs from the ``UpdateOne()`` method.
-   ``FindOneAndUpdate()`` performs a find and update as a single
-   operation, and eliminates the possibility of someone altering a
-   document between both operations.
+   The ``FindOneAndUpdate()`` method is an atomic operation, which means it prevents
+   any other write operations from changing the matching document until it
+   completes. The ``updateOne()`` method is also an atomic operation, but differs from
+   ``FindOneAndUpdate()`` in that you cannot specify a sort order for the
+   matched documents. 
 
+   If you don't need to find and update a document in a single transaction, you can call 
+   the ``findOne()`` method followed by the ``updateOne()`` method. 
+ 
 Modify Behavior
 ~~~~~~~~~~~~~~~