"A report is a specific form of writing that is organised around concisely identifying and examining issues, events, or findings" (Massey University, 2012). It usually covers the who, what, where, when, why and how of a particular situation, issue, or problem, and may be produced by government departments, research groups, not-for-profit organisations, companies, and others.
You will need to exercise some caution when accessing certain types of reports. Company reports and reports produced by charity organisations, for example, are produced largely for marketing purposes. It is possible that positive information will be highlighted, while more negative material is glossed over or omitted altogether.
Reports will generally be available for free on the Internet, and simple strategies are often more fruitful than the rigourous strategies used for database searching.
Websites of relevant organisations
Search or browse the websites of key organisations in your research area. Looking out for links to 'publications', 'reports', or 'collections' can help. Remember, reports are produced by companies, government departments, professional associations, not-for-profit or charitable organisations, academic or research institutes and may more. Depending on the focus of your topic, the following sources may be useful:
Online search engines
Search engines such as Google are useful when searching for reports. Most reports will be published online in PDF form, so it's helpful to limit your results by file type:
Google searches will often return large numbers of results so consider limiting your search by date (e.g. last 5/10 years) etc. in Advanced Search.