diff --git a/README.md b/README.md
index 1959b795..f8a8bb78 100644
--- a/README.md
+++ b/README.md
@@ -268,7 +268,33 @@ Module | Description
 For more information, see the [Modules documentation](doc/Modules.md).
 
 ### Functions
-Functions are "commands" that accept input, manipulates it and then outputs the result.
+Functions are commands that accept input, manipulate it and then output the result. They are extremely
+useful with [piping](#piping) or [command substituting](#substitution).
+
+For example, the `uri_escape` function demonstrated in the [Substitutions](#substitutions) section earlier
+makes text safe for use in a URL. We also saw the `sed` and `uc` functions demonstrated in [Piping](#piping).
+
+    <pragma-> uri_escape thing's & words
+       <PBot> thing%27s%20%26%20words
+
+As demonstrated previously, the `sed` function replaces text using a substitution regex. The `uc` function
+uppercases the text.
+
+    <pragma-> echo Hello world! | {sed s/world/universe/} | {uc}
+       <PBot> HELLO UNIVERSE!
+
+Here's a short list of the Functions that come with PBot.
+
+Name | Description
+--- | ---
+`uri_escape` | Percent-encodes unsafe URI characters.
+`sed` | Performs sed-like regex substitution.
+`pluralize` | Intelligently makes a word or phrase plural.
+`unquote` | Removes surrounding quotation marks.
+`title` | Title-cases text. That is, lowercases the text then uppercases the first letter of each word.
+`ucfirst` | Uppercases the first character of the text.
+`uc` | Uppercases all characters.
+`lc` | Lowercases all characters.
 
 For more information, see the [Functions documentation](doc/Functions.md).
 
diff --git a/doc/Functions.md b/doc/Functions.md
index ea057ac6..342821a4 100644
--- a/doc/Functions.md
+++ b/doc/Functions.md
@@ -1,5 +1,32 @@
 # Functions
 
-Coming soon.
+This is a place-holder from the main [README](../README.md#functions) until I have time to flesh this out more.
+If you've already read that section, there is nothing new here.
 
-Last edit: Feb 14, 2020
+Functions are commands that accept input, manipulate it and then output the result. They are extremely
+useful with [piping](../README.md#piping) or [command substituting](../README.md#substitution).
+
+For example, the `uri_escape` function demonstrated in the [Substitutions](../README.md#substitutions) section earlier
+makes text safe for use in a URL. We also saw the `sed` and `uc` functions demonstrated in [Piping](../README.md#piping).
+
+    <pragma-> uri_escape thing's & words
+       <PBot> thing%27s%20%26%20words
+
+As demonstrated previously, the `sed` function replaces text using a substitution regex. The `uc` function
+uppercases the text.
+
+    <pragma-> echo Hello world! | {sed s/world/universe/} | {uc}
+       <PBot> HELLO UNIVERSE!
+
+Here's a short list of the Functions that come with PBot.
+
+Name | Description
+--- | ---
+`uri_escape` | Percent-encodes unsafe URI characters.
+`sed` | Performs sed-like regex substitution.
+`pluralize` | Intelligently makes a word or phrase plural.
+`unquote` | Removes surrounding quotation marks.
+`title` | Title-cases text. That is, lowercases the text then uppercases the first letter of each word.
+`ucfirst` | Uppercases the first character of the text.
+`uc` | Uppercases all characters.
+`lc` | Lowercases all characters.