This study investigates the influence of social media on language use among young adults, focusing on changes in vocabulary, grammar, and communication styles. A mixed-methods approach was utilized, incorporating both quantitative surveys and qualitative interviews with 200 participants aged 18-30. Results indicate a notable shift towards informal language, the frequent use of abbreviations and emojis, and alterations in writing confidence. This research highlights the implications for literacy education and suggests the need for incorporating social media literacy into curricula to better prepare young adults for effective communication in an increasingly digital world.