Before presenting information you need to think about who the information is for. This is your audience. Think about the level of knowledge and understanding of your audience. Also think about the best way to communicate your information.
If you are presenting a talk to a group of students who are learning English as a second language, you would use simple words and lots of images.
If you are writing an essay for a diploma level course, you would use more professional language and longer sentences.
Ask these questions:
Does my audience already know some of this?
How much background information will I need to provide?