Here is an example of a landing page we use on Google's Vehicle Ads. We created a separate set of VDPs that are optimized for Vehicle Ads. They generate more leads and visitors are more engaged.

It was a whole process to A/B test and come up with these landing pages. We initially noticed the normal VDPs had a high bounce rate when coming from Google's Vehicle Ads. When we looked into the analytics, we saw that a high percentage of users that stayed scrolled down and clicked on a similar vehicle. So initially, we expanded that section from showing 3 vehicles to 6 vehicles.
Somewhere down the line, we added a link to the SRP. More people stayed and shopped.
We went crazy and expanded that section again to 12 and a little more people stayed.
We then decided to redesign the VDP and create a separate VDP just for VLA. Through several more iterations, that screenshot is where we're at now.
We did a case study with another dealer group and they saw an overall increase of 59% more leads, 122% increase in engagement and a 36% decrease in bounce rate.
This is all due to changing the landing page. Same spend and more leads.
You can carry this same process to all campaigns, even monthly offer campaigns.