How do I check out a company online?

Sure, here's a description in the tone of a questioner, based on the paragraph "How do I check out a company online?": "Hey there, I'm trying to research a company online but I'm not sure where to start. Can you give me some tips on how to check out a company's reputation and financial health online? Are there any specific websites or tools I should be using? And what should I be looking for when I'm evaluating a company's online presence? Thanks in advance for any help you can provide!