These type of ads are Typically instant messenger chat box.
Adunit Sizes Desktop: 250×150 ad at the bottom right.
Mobile: 300×100 on bottom center for Screen.
Targeting options available:-
| Campaign Settings | Options | 
| Self Serve Platform | ✗ | 
| Demand and Supply Platfom | ✔ | 
| Geo Targeting | ✔ | 
| Device Targeting | ✔ | 
| OS Targeting | ✔ | 
| ISP/Carrier Targeting | ✔ | 
| Browser Targeting | ✔ | 
| IP Targeting | ✔ | 
| Website Targeting | ✗ | 
| Language Targeting | ✔ | 
| Day time Targeting | ✔ | 
| Category Targeting | ✔ | 
| Demographic Targeting | ✗ | 
| ReTargeting | ✗ | 
| Black/White Listing | ✔ | 
| Frequency Capping | ✔ | 
| Tracking Token Options | ✔ | 
| Keywor Targeting | ✔ | 
| Anti Fraud detection | ✗ | 
| Adult Ads Channel enabled | ✔ | 
| Gambling Allowed | ✔ | 
| Dedicated Account Manager | ✔ | 
