Answer:
1. Paying to get the job
2. Promises unrealistic salary
3. Read the content carefully
4. Requesting Social Security number, credit card number or paypal details
Explanation:
Firstly, you need to realise the prime goal of all scams. To make money illegitimately. THey would do this by either asking for money straight up or by asking for personal details. They would use these details to later on convince you that they are an authorised party which is why they have your details.
1. No legit job would ask you for money. The entire purpose of a job is to utilise your skills and GIVE YOU money in return.
2. If it sounds too good to be true, it probably is.
3. Scamming content is usually riddled with spelling errors, especially in the bogus email address they are using. Be keen on spotting these mistakes. Moreover, if they send you a link and the link asks you to make a login of sorts, understand, that the password will not be protected.
4. If a company asks for any personal details that they have nothing to do with. They are probably gathering your data to scam you later. Or even steal from you.