I think digital ethics is a very important part about research. It is easy to just copy and paste something and call it your own, but that I not ethical. It is important to give credit where credit is due, so to speak. If a sentence is taken from the article, it is important to cite the article, author, etc.
Taking a photo from a site is a bit more tricky, sometimes it’s not possible to find information about a photo to cite it properly, but it is important to do the best that you can. Research as much as possible to find correct information, but if all else fails, at least cite the website where you found it. If a picture requires permission to use, get permission. Ideally you’d be able to get permission for ever photo you use, but unfortunately that is not the case. It is very important, however, to get permission regardless if you are using a photo or text that is copyrighted. This will save you some legal trouble down the road.