Most companies have a WordPress site, a separate e-commerce system, and a third system for CRM and invoicing. Odoo Website lets you build the website in the same system as everything else. Simpler to maintain and eliminates integration work.
Drag-and-drop
The website builder works visually. Drag blocks (text, images, columns, forms, buttons) onto the page. Customize colors, typography, and spacing. It doesn't replace a professional web designer, but it's enough to build a presentable company site without coding knowledge.
Themes
Odoo ships with several themes. They're starting points you customize, not finished products. To truly match a brand's visual identity, you need custom SCSS and possibly custom templates.
SEO
Basic SEO tools are built in: meta title, meta description, URL slug per page. Sitemap is generated automatically. Robots.txt can be edited. It covers the basics, but for advanced SEO (schema markup, advanced analytics) you need custom development.
Forms and CRM
Contact forms on the website automatically create leads in CRM. Field mapping is configured without code. Customer fills in the form, a lead is created, the salesperson gets a notification. No Zapier, no webhooks, it just works.
Blog
The blog module supports categories, tags, authors, and SEO metadata. Not as feature-rich as WordPress, but fully sufficient for company blogs. And it's connected to the same analytics system as the rest of Odoo.
Odoo Website is best for companies already using Odoo for CRM, inventory, or invoicing who want to keep everything in one place.