Amazon defines this as:
Includes sales of advertising services to sellers, vendors, publishers, authors, and others, through programs such as sponsored ads, display, and video advertising.
Last reported quarter 2024 Q2 it was $12.77 billion, up by 20% year-over-year from $10.68 billion. From $37.74 billion in 2022 it increased by 24% to $46.91 billion in 2023.