Without any further description about what you're trying to do, it's difficult to answer the question.

There are millions of different ways:

You can do your landing pages in WP and easily integrate with newsletter pop-ups and all the other growth hack tricks.

If you have a SaaS you can run the whole subscription system (accounts, billing, renewals, etc.) using WooCommerce.

You can sell digital downloads of your software using WooCommerce.

You can keep your user-facing documentation in WP.

There are plugins for turning WordPress into a CRM so you can track your leads/sales.

etc.

The possibilities are literally limitless.