When using the free GeoLite2 databases, you can meet the GeoLite2 attribution requirement by including the following in all advertising and documentation mentioning features of or use of GeoLite2:
This product includes GeoLite2 data created by MaxMind, available from <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
The attribution would need to appear somewhere public-facing on your site (or product) to meet the requirement. If the GeoLite2 database or the data itself is specifically referenced on a particular site page, then we would ask that the attribution message also be included on that page. You don’t need to put the attribution message on every site page, and you are also not generally required to put it on your homepage; for example, you could put it on your “About” page.
If you’d like to use GeoLite2 without giving attribution, you can purchase the GeoLite2 Developer’s Package.