In person forms of activism are more effective in making lasting change. While an online hashtag certainly may raise awareness, that’s really all it can do. Websites like GoFundMe are great to raise money for a cause, but ultimately, real change is made through human interaction. Online activism can sometimes be seen as privileged people wanting to seem sympathetic, while not actually helping.
There’s several things you can do in-person to make a lasting change. You can start a protest, create a charity, volunteer at an organization, donate money, etc. More people are going to want to listen to what you say if you approach them in person, compared to a mass email. This is why in-person forma of activism are more effective.