diff --git a/README.md b/README.md
index 75b71a4..97b8d6d 100644
--- a/README.md
+++ b/README.md
@@ -31,18 +31,46 @@ As of this writing (2023-04-30), this has only been tested in Vim v9, but is als
     ```
     If you want to have other file types to use this plugin, you may add them to the `allowlist` above.
 
-1.  By default, this plugin tries to determine if the cursor is in an email address field ('From:', 'To:', 'Cc:', 'Bcc:', in English).  The matching is case-insensitive.  If you use another language, that names these fields differently, you can modify this in $MYVIMRC by adding the `g:muttgoobook_address_fields` global variable.  This is designed to be a Vim regular expression, replace `['from', 'to', 'b\?cc']` accordingly:
+1.  By default, this plugin tries to determine if the cursor is in an email
+    address field ('From:', 'To:', 'Cc:', 'Bcc:', in English).  The matching is
+    case-insensitive.  If you use another language, that names these fields
+    differently, you can modify this in $MYVIMRC by adding the
+    `g:muttgoobook_address_fields` global variable.  This is designed to be a
+    Vim regular expression, replace `['from', 'to', 'b\?cc']` accordingly:
     ```vim
     let g:muttgoobook_address_fields = '^\s*\(from\|to\|b\?cc\):\s*'
     ```
     The above pattern is the default if this variable isn't specified.
-1.  Also, if your mutt aliases file is in a different path than _${HOME}/.mutt/aliases_, you can override it in $MYVIMRC with the global variable `g:mutt_aliases`:
-    ```vim
-    let g:mutt_aliases = '~/.mutt/aliases'
+1.  Also, if your mutt aliases file is in a different path than
+    _${HOME}/.mutt/aliases_, you can override it in $MYVIMRC with the global
+    variable `g:mutt_aliases`: ```vim let g:mutt_aliases = '~/.mutt/aliases'
     ```
-    Again, what appears above is the default if not set explicitly to something else.  Any double-quotes (`"`) and backslashes (`\`) in the mutt aliases file will be removed before pasting the results of the completion to the currently edited mail file.
+    Again, what appears above is the default if not set explicitly to
+    something else.  Any double-quotes (`"`) and backslashes (`\`) in the mutt
+    aliases file will be removed before pasting the results of the completion
+    to the currently edited mail file.
+
+## How to use it 
+If asyncomplete is installed correctly and is working, editing
+a file type of `mail` should show the popup completion menu after you've typed
+the first three characters of the name or email address, as long as the cursor
+is in a `From:`, `To:`, `Cc:`, or `Bcc` field.  Case doesn't matter for the
+name of the address field, and the cursor can be in a multi-line list of
+names/email addresses.  
+
+The listing of the popup completion menu will show mutt aliases and names from
+goobook that match the string entered thus far.  You can further limit the
+results returned in the popup completion menu by typing more characters.
+Select the alias or name and press `Enter`, and the value from the alias will
+be pasted (for mutt aliases), and the name and email address from Google
+Contacts (goobook).  Values from mutt aliases will be pasted verbatim except
+backslashes (`\`) and double-quotes (`"`) will be removed.  Email addresses
+from goobook will appear between angle brackets (`<` and `>`).
 
 ## TODO
-* possibly set up some kind of trigger to post an email address from the mutt aliases file or Google Contacts, within the body of the message.
+* possibly set up some kind of trigger to post an email address from the mutt
+  aliases file or Google Contacts, within the body of the message.
+* Maybe integrate with other CLI contact services, but the project may need to
+  be renamed
 * Perform more testing!