When writing a scientific literature review, it is important to explore the primary scientific literature as comprehensively as possible, and from that, develop an argument about the trends and directions in the scholarly conversation. You'll need to look at how authors respond to each other, and assess their work critically.
In order to do both of these things, you'll need to search widely (which you can do on the Articles tab), using both general and focused databases, and manage your research (which you can learn more about on the Citation and Zotero tab). As you get started, you'll want to identify keywords and develop a search strategy, and perhaps search for background information in OneSearch.
Before you search, it's a good idea to come up with and record some possible keywords. Remember, though, that as you learn more about your topic, and perhaps even develop new questions, your keywords will change and shift.
As you're generating keywords, think about: