Most databases are not free - the Library or the Southampton Business School pays for access. So, you will normally either need to be on campus, connected to SVE (or VPN) or logged in with a password. Click on the icons next to each database for more information.
The Library and the Southampton Business School provide you with access to a range of databases that contain good quality information that is not freely available online - so you won't find most of it by Google searching. The databases are available via this website and are divided into categories to help you find what you need.