My first impression are the words “activism” and “engagement”. Although they may have similar meanings they’re completely different. You can be “active” in political stance (i.e. Donating money, spreading the word, etc) but are you actually “engaging” in it? (I.e. Volunteering, writing and distributing petitions, etc)
They’re relating because they both are based on social and political ideology but they’re two different ways of going about making a change.
Social and political activism on social media platforms can be seen through simple actions such as liking, sharing, or retweeting a stance. You can even donate money through technology. As for civic engagement online, I would consider documentary makers and reporters the engaged. Why? Because they are out in the field getting the facts to help create awareness and help engage others