Shilling in the cryptocurrency domain refers to advertising and promoting new crypto projects to drive up the value of their tokens by convincing more investors to buy into them. It is an implicit form of advertisement by an influencer or a user with an established reputation who talks up a crypto project to generate more interest in it.
The persons who perform shilling are referred to as shills and pretend to offer informative advice on the project based on their knowledge and expertise. However, they are mostly paid for promoting the projects and spiking the value of their tokens.
Shilling is banned in the formal, traditional financial markets. But since the crypto market is mostly unregulated, it is filled with shills promoting projects that turned out to be scams.
We recommend that crypto investors perform due diligence through DYOR (do your own research) instead of falling for fake shilling promotions in the market. Such schemes that offer high returns could cause losses and be unreliable to invest in.