How can I use a database?

Databases are of various types. But it has some differences. Which are of various types.

Here we will introduce something about our database.
Our company mainly works with Italy Consumer Email list data sales. For example, a country's mobile number list, WhatsApp list, email list, etc. are all online based.

Now the question here may be what to buy them?
Various online activities can be done through these data. Which can be called digital marketing.
Database plays a very important role for digital marketing. By digital marketing, we mean creating a work organization online and creating some work yourself, in other words it can be said as a means of promoting your brand. In that case, in the country where I want to do our marketing, I need to keep the online medium. And here mobile number, whatsapp number, mail play a very important role to promote your brand.
Because marketing with them has a special role nowadays.

Now the question is where to get them and how to get the new data?
In answer I will say that you will get these data online. For example, the website named Database Sale will get this data.