"...[A]lternately covering and uncovering the single word INGSOC." (pg. 2)
Ingsoc is the Party's word to represent English Socialism, the doctrine that the Party professes to practice. As part of their control of Oceania, the Party has implemented the use of their new language, Newspeak. Like they do with technology, the Party also uses language as a control of the people. They take words that mean one thing and turn them into completely different things and even eliminate words all together. Orwell's idea that by controlling language, you can control thought is very important to 1984. If the Party can rewrite language and completely get rid of any word that expresses an idea of rebellion or a controversial thought, they can get rid of the actual idea or controversial thought all together.