What are the 3 key elements that go into making a brand or ad campaign memorable for a lifetime?

This is the only TV advertisement I have ever seen that I would class as "memorable for a lifetime".

https://www.youtube.com/watch?v=jMnl7H6KVgY

(The quality is not brilliant but it's watchable.)

The key moment that made it memorable is the line, "Pea and ham?  From a chicken?".  I happen to know that it's not just me, others found it memorable too.   I remember the product, not just the advert. 

I would say that that the3 magical components are:

- great film-making (script, direction, acting, location spotting, design, etc.)

- balanced emphasis on the intertwining of the advert and the product

- connection to the potential customer (I identified with the people and the story)

It's interesting that even though the tagline is excellent (and even includes a lovely pun) I didn't remember it at all.  I didn't even remember it after watching the advert a moment ago, I had to go back and see if there even was a tagline.  A great tagline might make a memorable tagline, but it doesn't make a great advert.

very simple

not expected

touches our lives 

1) Creativity

2) Uniqueness

3) Good tag line

1.Disruptive and relevant visual,

2.Strong brand identification

3.Brilliant headline

-creative and unique but not to complicated -reach the target audience -cost effective 

CREATIVITY 

BRAND IDENTIFICATION 

CONTINUATION 

Reputaion

Commitment

attractive

  Creativity

 Good tag line

a good advertisement 

it needs to uniqueness ,being differentiate and diversity to creative ideas.

emotional 

based on geographical circumstances

funny