By looking at the Why? section, you will see that there are many benefits to citing and referencing correctly.
The next stage is to figure out when you need to cite and when you don't.
For further help on using citations in your assignments/research, please see How? Critical Thinking and Academic Writing.
You need to cite and reference anytime you use information that doesn't belong to you. Common mistakes/difficulties include:
Do not over-cite
The idea in academic writing is to show your marker that you have a good understanding of the topic, you do this by writing in your own words, but also by providing evidence that you have read from appropriate / authoritative sources.