So you basically sold air. You didn't had the skills you were selling nor could guarantee the results you were promising. All you had was $19k and somehow you thought that would solve the problem, plus you'll learn something along the way. That's not ethical in any way, I don't think that client would've handed you those $19k if you honestly had said "hey I'm not an agency, I'm a freelance that's learning and wants an opportunity to do something great while gaining experience along the way".
Anyways, SEO is moving away from old practices like keywords and moving into AI territory, predicting chances of click based on your behavior, profile and demographics.
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So you basically sold air. You didn't had the skills you were selling nor could guarantee the results you were promising. All you had was $19k and somehow you thought that would solve the problem, plus you'll learn something along the way. That's not ethical in any way, I don't think that client would've handed you those $19k if you honestly had said "hey I'm not an agency, I'm a freelance that's learning and wants an opportunity to do something great while gaining experience along the way".
Anyways, SEO is moving away from old practices like keywords and moving into AI territory, predicting chances of click based on your behavior, profile and demographics.