I am sure you have seen the Google logo be alterated in the past, maybe it was on Valentine's Day or celebrating a famous artist's birthday (Bob Ross).
A Doodle is simply a fun way to celebrate holidays, birthdays, anniversaries, etc. Below the pictures showing a bit of information about Doodles (including how to vote for future Doodles) you will see an embedded 1 minute and 56 second YouTube tutorial.
You can even vote for future Doodles (categorized by grade level). You may vote 1 time a day until March 6th.
Any questions please let me know!