what makes a avert memorable? give an example

i always remember the funny advertisements i do
not know why but i think it is because i like things that
are funny i think that based on your personality you will
remember an advertisement.

what is the most funniest avertisement you have ever seen?

i saw a camercial and they showed a migit that
fell in love with a regular girl and then they said the
best things in life are small this was an avertisement
for mini twix pacages.