Many thesis projects involve consulting and citing a lot of sources. It's an excellent idea to take control of these as soon as you begin working on your thesis. Keeping consistent track of your sources and recording all the information about them that you'll need to cite them properly will save you time later on when you need to create a bibliography for your final paper. Reference management software like Zotero can help make this process much easier.
While Zotero is good at automatically creating citations for most commonly used sources, it doesn't "know" how to format citations for every kind of source that exists. There will be times when you'll need to correct a Zotero citation or create one yourself manually. Consulting the style manual used for your area of study can help.