Final answer:
Astroturfing is the practice of faking websites and sources to make them appear as objective sources, and it is used by corporate or special interest groups. Through Astroturfing, interest groups create the appearance of grassroots support for their cause through artificial means.
Step-by-step explanation:
The practice by corporate or special interest groups to fake websites and their sources to make it seem like they are objective sources of information is known as Astroturfing. Astroturfing is a strategy used to manipulate public opinion by creating the appearance of grassroots support for a particular cause, when in reality it is artificially generated by interest groups. It involves the use of social media and other platforms to create the illusion of widespread public support.