Allow internally...

[shaharhada]

In the link: https://www.nchsoftware.com/software/manage_cookies.html
that describes the terms of the cookies of the site: the site
Manage Website Cookies
Our website uses cookies to analyze traffic, customize website content and improve your user experience. Providing the best content and experience for our users is our top goal as a business. The data we collect is used only by NCH Software and only to provide you with the information you need to choose the best software. We do not sell your data.
__ Allow cookies to store your email address and similar info
If you uncheck this you might need to reenter every time.
__ Allow cookies for remarketing advertising
We understand if you choose not to.
__ Allow cookies for us internally to analyze traffic anonymously
Please allow this. It is helpful for us to improve our business.
…
What is the meaning of the bold text?
What is internally to analzye traffic?

 

[USAFRet]

It means they will analyze traffic passing through and using their website.
Hopefully, with this alaysis, they can make the service better.

"internally" means all of this investigation stays locally on their servers.