This is evolving field where there are as many 'experts' and 'consultants' as there are stars in the sky or fires in hell , depending on how you look at it.
But let us cut to the chase and summarize what really happens on social media. The first principle of social media is great and unique content that is share-able or share-worthy. Once you get this part solved, half the battle is won.
Do NOT buy likes, do not worry about getting likes. There is a clear and simple strategy to getting likes on Instagram which does not involve paying for traffic. Check out the upcoming book "Instagram CookBook" on Amazon.com, part of the cookbook series.
The second part of the strategy is to set aside a few MINUTES every day to submit some UNIQUE CONTENT on instagram every morning. You do not need to pay some disinterested jerk online $100 a month to do that, your success means nothing to him. Do it yourself. Use those 5 minutes that you would otherwise use to look at meaningless news on crapTV.
And resist the urge to use a bot, because Instagram is pretty good at finding bot users and shadow banning their accounts, where your account exists but no one sees it. It is the equivalent of sending your account to the Gulag.
But the main part is to HAVE UNIQUE AND SHARE-WORTHY CONTENT. An easy easy way to make lots of it for Instagram, Twitter and Tiktok. If your campaign is focused on UNIQUE viral images, try out this software contentlamp.com, but if you are planning on using both video and image content for your marketing efforts , try this one instead contentogre.com. It cost a bit more than contentlamp, but it is well worth it. What I like about contentogre is how I can throw in any videos I caught on my phone or downloaded online on free sites, add some 'memorable quotes' from some famous guys like Musk or Confucius , sneak in a product image of whatever I am promoting, and I get these remarkable vidoes and images that are unique and oh so shareable, I get a lot of likes for these beauties on instagram, and I am not even trying!