For me, ultimately I think everything boils down to 'H_ow do I increase the conversion rate on my product/service page._'
If 2 people out of 100 are filling the inquiry form, how do I give them the best experience and take this number to 5. Once reached 5, then how do I make it to 7. Rest all activities align towards this goal (revenue gen) - whether be it your SEO & page rankings, social media, retargeting, landing page copy, creatives, informational blogs posts, case studies & testimonials to win the trust, etc. etc.
If we go with an approach that if we do 'this', it has potential to give us X% improvement (with data to back it up) - getting management buy-in gets easy when numbers back you up (potentially run a small PoC as well wherever feasible)