diff --git a/main.py b/main.py
index 19461b4..5921e99 100644
--- a/main.py
+++ b/main.py
@@ -185,12 +185,19 @@ def get_ntnoe():
 def main():
     """Get the events on NTNOE the puts them on Google Calendar.
     """
+
+    # Authentication on google
+    logger.info('Authenticating on Google')
     credentials = get_credentials()
     http = credentials.authorize(httplib2.Http())
     service = discovery.build('calendar', 'v3', http=http)
 
+    # Retrieving the calendar on NTNOE
+    logger.info('Requesting NTNOE for {}'.format(NTNOE_ID))
     ical = icalendar.Calendar.from_ical(get_ntnoe())
 
+    # We need to find the id of the calendar we will edit.
+    logger.info('Looking for `ntnoe` calendar.')
     calendars = service.calendarList().list().execute()
     ntnoe_calendar_id = None
     for c in calendars['items']:
@@ -198,7 +205,7 @@ def main():
             ntnoe_calendar_id = c['id']
 
     if not ntnoe_calendar_id:
-        logger.info("Creating ntnoe calendar...")
+        logger.info("Creating `ntnoe` calendar...")
         created = service.calendars().insert(body={
             'defaultReminders' : [],
             'selected' : True,
@@ -210,6 +217,8 @@ def main():
     then = now + TIMEDELTA_SYNCHRO
     time_search = datetime.datetime(now.year, now.month, now.day, 1)
 
+    # NTNOE calendar often changes. So let's delete former synchronizations.
+    logger.info('Deleting former events.')
     former_ones = service.events().list(
         calendarId=ntnoe_calendar_id,
     ).execute()
@@ -221,6 +230,7 @@ def main():
             eventId=event['id']
         ).execute()
 
+    logger.info('Adding new events.')
     for e in ical.walk('VEVENT'):
         event = Event(e)
         t = (