Confused about SMM panel

Hi Guys, I'm newbie web developer and yesterday a guy approached me and asking about Instagram and twitter likes and followers. However, I'm familiar about these bot related activities but I was reading a blog in morning that every business owner use SMM panel to promote his business on social media platforms. As it's IT related forum, so I wanna ask that are these activities legit and allowed by social media companies? 

One more question, are these safe and secure to use?