Is it good for the speaker to read notes during a presentation? I am wondering whether it looks odd if a speaker reads notes during a presentation? I am asking this because, I noticed that a few presenters can’t present their work or research well due to nervousness and other factors such as language, pronunciation etc. 

So if a speaker makes notes and just reads them properly along with the slides, how will it look? Will audiences accept or criticize such presentations?

How will it be if the speaker speaks by him/herself, but he/she will look into the notes at necessary?
Twenty years ago it was not at all uncommon at international conferences in physics and electrical engineering to attend at "read" presentations, especially from old researchers from Asian countries who were not used to speak English.

How was it? Boring, utterly boring, and audiences drifted away. Please don't do or suggest it: if you feel uncomfortable speaking, rehearse, rehearse, rehearse.