I have been successfully advertising for a while in social networks (instagram, fb, twitter), but with the increasing popularity of instant messengers, I'm starting to make an advertisement to messengers. Did anyone have experience in such a case?
Can you show an example of this? What kind of messenger ads are you talking about (there are many ways to promote with Messenger)
if you want to make an advertisement to fb messenger, you can directly deliver ads by choosing a 'messenger' platform.
The best way is to buy ads there but you can also send messages to users, but it may be considered like spam and your account may be blocked. As for me I don't think that advertising in messengers is a very good idea. You better use other social media.