Thanks for asking about our forms. Long story short, it's MAGIC!
Just kidding. It's good old fashioned Marketing Automation!
We embed Hubspot forms into our blog posts and customize the CSS to include images and our on-brand colours. It then integrates directly into our Hubspot system when someone fills out the form. All the fields and confirmation pages are customized from directly within Hubspot and you have the ability to just use standard branding, too, if you don't want to go about any extra design work.
Here's a handy article from Husbpot's knowledge base if you wanna see a little more under the hood: https://knowledge.hubspot.com/articles/kcs_article/forms/how-to-embed-a-form-or-cta-in-a-wordpress-post-or-page
Let me know if you have any other questions!