Hello Gurus of trading

I am curious about the following:
Sometimes, I notice that a trade is placed in the orderbook and then the next second is canceled, then placed again etc and the process repeats.
Obviously this is a bot, but what is the point of this? Is this a trading strategy?
Just my opinion only they want try to make investor and other trader panic with his orderbook place and later cancel it, maybe he want us how to make orderbook above their price and other side he has much coin to sell, he try to give us interested way where seeing coin have much orderbook buy and we try to buy above price order by them, but few second they cancel buy order and our order filled but price suddenly dump.