At Matter Solutions, we only help clients post on Social Media as part of a comprehensive Digital Marketing campaign or as an add-on to an advanced SEO Campaign. If clients only need Social Media posting we have VA's and dedicated Social Media Only agencies who we can refer to.
Having said that we do often run Advertising Campaigns in Facebook especially. These can be very simple, just retargeting past visitors using the "facebook pixel" or they can be an advanced lead generation campaign.
Given our background in SEO, Websites and Google Ads we've been able to help all our clients who advertise on Facebook with their KPIs. Having clear metrics is essential for success through reliably making the right decisions.