Final answer:
Social media can influence mainstream media content through hashtag activism and the shaping of public opinion.
Step-by-step explanation:
An example of social media influencing mainstream media content is the use of hashtag activism, such as the MeToo and Black Lives Matter movements, which gained prominence through social media platforms. The widespread use and sharing of hashtags on platforms like Tw-itter and In-stagram allowed these movements to reach a global audience and shape public discourse.
Additionally, social media played a role in influencing political events, as seen with Tik-Tok users actively opposing Donald Trump's re-election and registering for seats at a rally, leading to a low attendance turnout. This demonstrates how social media can impact mainstream media coverage and shape public opinion.