Merge pull request #13 from Meg528/patch-5

Update 3-structure-aggregation.mdx

Author: dfreniche

docs/20-what-is-aggregation/3-structure-aggregation.mdx

@@ -1,10 +1,10 @@
 ---
-description: See the parts that compose an Aggregation Pipeline 
+description: See the parts that compose an aggregation pipeline. 
 ---
 
-# 📘 Structure of an aggregation pipeline
+# 📘 Structure of an Aggregation Pipeline
 
-To interact with a relational database we typically use SQL, a 4th Generation language to access our data. With MongoDB we instead get data and transform it in incremental steps.
+To interact with a relational database, we typically use SQL, a 4th-generation language, to access our data. With MongoDB, we instead get data and transform it in incremental steps.
 
 An aggregation pipeline is composed of [__stages__](https://www.mongodb.com/docs/manual/reference/operator/aggregation-pipeline/).
 
@@ -20,7 +20,7 @@ db.mycollection.aggregate([
 
 ## Example
 
-An Aggregation Pipeline that does the same than above SQL statement could be:
+An aggregation pipeline that does the same as the above SQL statement could be:
 
 ```
 db.mycollection.aggregate([
@@ -63,4 +63,4 @@ db.mycollection.aggregate([
       },
   },
 ])
-```
+```