Your question is not very clear Ahmad. However, I will be answering your question from how I understood it. As someone whose tasks involve online marketing, what I love most is the dynamic nature of it. By dynamic, I mean every changing. Of course that also poses challenges, you need to be updated on how to overcome those changes. Whether its changes on how Google indexes its search results- thus making you change how you can overcome it and share your content better, or changes on popular social media platforms.