What is a placeholder? And what does MTL infestation mean? Can somebody explain it pls :(

its when the Mangago bots scour every corner of the internet for the next chapter and upload it here. More often than not, its usually machine translated (e.g., google translate), practically ruining the reading experience for everyone. Placeholders are there so the bots would think there's already a chapter in place and won't upload anything. I hope I explained it properly. English isn't my first language..

oh! I see! thank you <3 english isn't my firt language either so I was kinda lost with the concept hahaha