Hello, I have a client on Upwork, we're already in a contract, he want to contact me using Slack, for smoother communication and organization, is it illegal?

I just renewed my written introduction, skill list, title and added specialized profiles 2 days ago, and now I noticed my job notifications are going to the other side of what I do, for example : PowerPoint, Video Editing, something like that, I do 3D design not that; My question is : Upwork's job notification based on what? and how you can control it? I just did some research using Ai and told me to save searches on what jobs I would like to get, if this helps then it's good, I'll see in the next 2 days what's going on.

Hey everyone! I just joined you in this great group, I hope to improve myself with the community and Nico's content! Anyways, my first question is, how I can do a video introduction as a non English native speaker? Actually at the moment, I can write and read English almost perfect, but speaking it, communicating, not yet, any tips how I can make a good professional video introduction? Thanks!