The Giver’s favorite memory is that of a loving family: people of different ages gathered together, opening presents beneath a tree covered in lights.
When Jonas asks The Giver to describe the memory, The Giver chooses to transmit it instead. Jonas experiences a room filled with very young and very old people, and he notices a powerful feeling he cannot name: “I couldn't quite get the word for the whole feeling of it, the feeling that was so strong in the room.” The Giver identifies that feeling for him as love.
The memory also introduces Jonas to the idea of grandparents, since old people in his own community are separated from their grown children and eventually sent to the House of the Old. This concept makes the memory especially important, because it shows Jonas a kind of family based on warmth, affection, and lasting emotional bonds over multiple generations. After receiving it, Jonas wishes his own family could be like the one in the memory and wishes The Giver could be his grandfather.
The Giver's favorite memory gives Jonas a concrete experience of what his community has erased. It helps turn his dissatisfaction with "Sameness" into a deeper longing for a more vibrant life with a loving family.