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Some web applications such as CRM’s (https://app.hubspot.com/ - https://app.moskitcrm.com/), start the url with "app" instead of "www".
I would like to know if these are applications that are somehow integrated with the applications that run in the browser, and how this happens.
This question is not about programming, it was simply a definition of the company itself, it simply defined this prefix of this domain for this, ie they made a web application with this domain.
– Wictor Chaves
If you want to know more about this, search on, domain prefix or sub-domain
– Wictor Chaves
Subdomains are Urls for different sections on your site. They use your main domain and a prefix. For example, if your domain is "www.seudominio.com.br", a possible subdomain, it could be "support.seudominio.com.br".
– Wictor Chaves
Wictor, ball show! That’s exactly what I needed to know. Thank you so much.
– Felipe Braz