How To Do Library Research
Also consider the publication cycle of information. If you are seeking information on a very current or timely topic, then scholarly articles and books addressing the topic may not be available, but newspaper articles and popular articles may be reporting on the topic because they can be published much faster.
Social media and breaking news coverage will be available on very current topics, but due to the nature of breaking news, accuracy of the information may vary widely.
For more information on understanding the publication cycle, you can can take the online tutorial on Defining and Comparing Different Publication Types.