On Facebook you are not the owner of the published content!
When you have a website and create content for that website, everything you have achieved with your creative power and discipline remains yours. Any blog, product description or even the history of your company will remain your property forever.
On Facebook, there is always the possibility that you "offend" the platform. Thus, that content may be deleted and you may lose all your statistics on those posts. Basically, all the work you put into that content would be for naught, because Facebook decided that the content you posted didn't quite fall under their rules.
This can happen very easily. Reports can even come from your competition and your content will disappear. There is also an even grimmer case where your sweden phone number entire Facebook page is deleted. This case is, of course, rarer, but if something like this happens, all your content will be lost. All your followers will make you disappear. Basically, all your work will be in vain.
If you have a website, you own your content. That doesn't mean you can publish anything. You still have to be careful how you speak and present certain issues, but there is never a problem of running out of content you post on the site!

A Facebook page is very ok, but it is not an alternative to a website
Branding tools on Facebook are highly standardized.
All Facebook business pages look roughly the same. There are some patterns, such as shopping, political person, business or others, but they don't change your Facebook page much.
Basically, your branding elements can't stand out too much, because no matter how well they're done, your page will largely look like any other Facebook business page on the social media platform.
A website created by you gives you the possibility to extend the branding elements in any area of the site. The sidebars, the bottom of the site or the header can all be made exactly how you want them to look. Basically, owning a website is just like building a physical store or dealership. You can arrange it exactly how you want!
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