Comment marketing is sort of like the digital version of word-of-mouth marketing; it allows actual people to advertise or vouch for products/services they use within social media or digital platforms. This is why I view it as an essential part of modern-day marketing. The thing is though, it's much slower and requires more effort than your usual marketing strategies; definitely not good to rely too much on it especially if you're looking forward to scaling. You're better of automating your sales and marketing processes through various apps and integrations readily available within the marketing industry right now. It makes for a more seamless process that can net you more prospects and leads. Try reading this guide to get you started, hope this helps!