If you want to create a great resume and ace your interview, you will need to know the prospective employer. Learning details about the organization allows you to identify its needs and market yourself accordingly. Employer research also enables you to conduct a more focused, effective job search.
It is best to use a variety of resources to obtain a broad range of information about potential employers. Most organizations have websites with mission, history, services, etc. Using search engines and social media sites will give you current information. If you find negative information, be sure to check it against other credible sources before making assumptions. If you know anyone who works for the organization, you can reach out to them for information.
If you learn of a hiring organization that sounds questionable to you for whatever reason, it is worth your time to confirm the employer’s identity. Avoid jobs that require you to pay money up front, and never provide your Social Security Number, driver’s license number, or date of birth until you have confirmed the legitimacy of the employer and the job offer.