[DOCS] Modified section headings, edited text for clarity. (#44988)

* [DOCS] Modified section headings, edited text for clarity.

* [DOCS] Modified section headings, edited text for clarity.

* [DOCS] Modified section headings, edited text for clarity.

docs/reference/analysis/analyzers/simple-analyzer.asciidoc

@@ -1,11 +1,11 @@
 [[analysis-simple-analyzer]]
 === Simple Analyzer
 
-The `simple` analyzer breaks text into terms whenever it encounters a
-character which is not a letter. All terms are lower cased.
+The `simple` analyzer breaks text into terms at any non-letter character, such
+as numbers, spaces, hyphens and apostrophes, discards non-letter characters, 
+and changes uppercase to lowercase.
 
-[float]
-=== Example output
+==== Example
 
 [source,js]
 ---------------------------
@@ -108,30 +108,30 @@ POST _analyze
 /////////////////////
 
 
-The above sentence would produce the following terms:
+The `simple` analyzer parses the sentence and produces the following 
+terms: 
 
 [source,text]
 ---------------------------
 [ the, quick, brown, foxes, jumped, over, the, lazy, dog, s, bone ]
 ---------------------------
 
-[float]
-=== Configuration
+==== Configure parameters
 
-The `simple` analyzer is not configurable.
+The `simple` analyzer does not contain configurable parameters. 
 
-[float]
-=== Definition
+==== Customize
 
-The `simple` analzyer consists of:
+The `simple` analyzer is defined by one tokenizer:
 
 Tokenizer::
 * <<analysis-lowercase-tokenizer,Lower Case Tokenizer>>
 
-If you need to customize the `simple` analyzer then you need to recreate
-it as a `custom` analyzer and modify it, usually by adding token filters.
-This would recreate the built-in `simple` analyzer and you can use it as
-a starting point for further customization:
+To customize the `simple` analyzer, duplicate it to create the basis for 
+a `custom` analyzer. The new analyzer can be modified as required, usually by 
+adding token filters.
+
+===== Example
 
 [source,js]
 ----------------------------------------------------
@@ -152,4 +152,4 @@ PUT /simple_example
 ----------------------------------------------------
 // CONSOLE
 // TEST[s/\n$/\nstartyaml\n  - compare_analyzers: {index: simple_example, first: simple, second: rebuilt_simple}\nendyaml\n/]
-<1> You'd add any token filters here.
+<1> Add token filters here.