I have noticed that my website and wordpress are very slow, and I have checked my internet and everything seems fine. When looking on google I found out that it might be from the hosting account. Any idea how I can make it work faster?

Hello all, I am on Module one lesson 11 on this course and I have a question about uploading media, as I didn't quite understand the explanation. So when uploading an image that is not mine and I took from the internet should I just put the link of where I took the image from or how should I proceed in this case? Awaiting for an answer. Thank you in advance!