They also do this on the web version of Outlook. [1].
And you could see that the ads are littered all over the place. And their ads don't really make sense anyway, as for example, the ads that I see are something that:
- I am not interested - Irrelevant as the products have no use for me - Unable to purchase as the products themselves are not available locally where I am located.
They should probably train their algorithms for ads to ensure that it is something interesting (or at least would compel the consumer to look). For example, I noticed that in Instagram, the ads are more targeted, and they usually remind you of stuff that you have recently searched.