I am trying to convert a normal website to an odoo website (which easily can be done through this link https://www.odoo.com/de_DE/page/startwebsite), the thing is that the website also has products (that are already being advertised). Is there any way for me to migrate the products on the web page and have them also on my other modules of odoo system? (for example on inventory, sales, POS and much more) 

Thank you in advance for anyone who might help.