“All my conversion rates are much lower than common”. Conversion rate alone isn’t a good indicator of advertising and marketing achievement. This is where you’ll need to examine other data sets. Align your conversion rate with win rate and velocity by channel.
Hopefully you’ll start seeing some valuable patterns in the knowledge. If, for instance, your conversion rate is low, but your win rate is extraordinary, it might just mean you might have a very conservative advertising handoff or stringent lead scoring system, that is OK. Another situation could be that your leads have extremely low pace so they’re sluggishly moving during the funnel, taking years to transform and discover value.