Why is HubSpot a marketing hub?

HubSpot Marketing Hub is primarily an email management system like Constant Contact. Since HubSpot CRM is free and much better than Salesforce, HubSpot CRM captures all email activity in addition to the Marketing Hub reporting. We also use it to embed forms on websites, the chat, the IP address lookup for visitors (like LeadLander), and if you upgrade to Pro or Enterprise, you can start implementing workflow automation based on user activity with your emails and on your site. HubSpot Marketing Starter vs. Pro - a comparison: https://www.innovaxisinc.com/b2b-marketing-strategy-blog/hubspot-marketing-hub-starter-vs-professional

They have all you need to start a marketing campaign: from landing page creation, email marketing, and CRM system to nurture your community. It's a one stop software solution to start building your brand community.

Because its a marketing software that offers different solutions to manage leads, analyze customer behavior, transactions and activities through different channels, as well as to publish content and creat marketing campaigns in one place