It works relatively quickly. In my experience, the ads show up within a few hours, and it only takes a few days to max out my ad budget and the number of clicks to stabilise (given that you are not spending a crazy amount).
For most shops, I would recommend a budget of $3-10 per day for a week so that you have enough data and statistics to know which of your listings work and which don’t.
Alternatively, you can set a low budget of $1. But Etsy would take longer to optimise the clicks and you won’t have a good amount of statistics until after a month.
To cancel Etsy onsite ads, go to ‘Etsy ads’ under ‘marketing’, then click other options to turn off ads.
For offsite ads, you can only turn it off if you make less than $10,000 a year in sales. Go to ‘settings’ and ‘offsite ads’, and click ‘stop promoting my products’.
Not anymore. You can only control the daily budget and which listings to run ads on.