Should I connect HubSpot to both my marketing site and software platform or just one?

I’m launching a startup and need advice on HubSpot setup. My marketing website handles lead generation and captures signups, but when users start their free trial, they get redirected to our application on a different domain. This means potential customers interact with one URL while actual users are on another. I’m confused about the best approach here. Is it possible to set up HubSpot integration on both domains to track the complete customer journey from prospect to paying user? I want to make sure I don’t lose important data or create tracking gaps. Any guidance would be helpful since I’m new to this and want to avoid costly mistakes.

To effectively capture the entire customer journey, it’s essential to implement HubSpot tracking on both your marketing site and application domain. Without this integration, you risk losing critical insights into user behavior post-signup. Make sure to set up cross-domain tracking so that HubSpot can link user interactions from the marketing site to the app. This involves adding the necessary tracking code to both domains and making specific adjustments in your HubSpot settings. Although it may seem complex, it’s crucial for understanding which marketing efforts lead to actual conversions beyond initial signups.