diff --git a/analytics.py b/analytics.py
index 7e04fbd..e723457 100644
--- a/analytics.py
+++ b/analytics.py
@@ -3,6 +3,9 @@
 import datetime
 
 def db_insert(bill, author, sub, post_t):
+    """Stores information about bots activity in MySQL database. 
+    Including, username of Reddit user who called the bot, subreddit where the user posted his reequest, date of request and general information about requested legislation.
+    """
     chamber = bill.bill[:1]
     billid = int(filter(str.isdigit, str(bill.bill)))
     billtype = ""
@@ -25,6 +28,7 @@ def db_insert(bill, author, sub, post_t):
     cursor = db.cursor()
 
     try:
+        """Inserts data into table bills. If INSERT fails, rolls back database and prints exception message."""
         cursor.execute("INSERT INTO bills (chamber, billid, billtype, congress, link_author, subreddit, date_linked, post_type) VALUES('%s', %d, '%s', %d, '%s', '%s', '%s', '%s')" % (chamber, billid, billtype, congress, link_author, subreddit, date_linked, post_type))
         db.commit()
     except Exception as e:
diff --git a/mention_bot.py b/mention_bot.py
index e7cf97c..0f8b370 100644
--- a/mention_bot.py
+++ b/mention_bot.py
@@ -15,6 +15,8 @@
 pp = ProPublica(const.PROPUB_KEY)
 
 def bot():
+    """Searches Reddit for mentions of the bot.
+    If found replies with information about legislation user requested."""
     for mention in reddit.inbox.stream():
         if "+/u/congress_bill_bot" in mention.body.lower():
             print "************SUMMONED*************"
@@ -31,6 +33,7 @@ def bot():
                 comment.reply("Sorry, I couldn't seem to find that bill.")
 
 while True:
+    """Main program loop. Runs until interrupted by user or until exception occurs."""
     try:
         bot()
     except KeyboardInterrupt:
diff --git a/utils.py b/utils.py
index 8350a74..9aa7160 100644
--- a/utils.py
+++ b/utils.py
@@ -4,6 +4,10 @@
 from datetime import datetime
 
 def parse_url(url):
+    """Returns type of legislation and  its ID.
+    arguments:
+    url - URL of legislation from Congress.gov	
+    """
     url_parts = url.split('/')
     congress, chamber, billid = url_parts[4], url_parts[5], url_parts[6].split('?')[0]
 
@@ -35,9 +39,18 @@ def parse_url(url):
     return congress_number, full_billid
 
 def find_urls(comment):
+    """Returns URL found in Reddit comment.
+    arguments:
+    comment - Reddit comment to be searched for potential URLs
+    """
+
     return re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', comment)
 
 def format_comment_from_bill(bill):
+    """Retuns string describing the legislation, formatted as a Reddit comment.
+    arguments:
+    bill - JSON object describing legislation obtained from Congress
+    """
     newline = "  \n"
 
     comment = u"#\U0001F3DB **Here is some more information about [" + bill.bill + "](" + bill.congressdotgov_url + ")**" + (" - [PDF](" + bill.pdf + ")" + newline if len(bill.pdf) > 0 else "" + newline)