SEO is not what it used to be. Most are still stuck in 2004 (or even 2012). You can hire in-house, oversees, off Upwork, an SEO agency, you can order an SEO reseller package, or you can figure it out yourself. Whatever it is you choose, it must focus on what YOUR brand needs. Custom tailored SEO is what works.
Many marketing and SEO agencies won’t factor in engagement. They focus on old school metrics that worked in 2004. Those out-dated SEO packages actually hurt your brand more than help.
Don’t waste money on hurting your brand. If you’re looking to hire an SEO service, you need a custom growth plan focused on what’s working now, and will continue to well into the future.