The title says it all. When you use DuckDuckGo, is your personal information, including IP address, really not tracked either by them, or the sites you visit?
Asking for a friend 
I can’t imagine they have any control of what the sites you visit track.
It’s the default search engine for the Tor browser.
I once went from DDG to some other site (can’t remember what it was, but possibly Google maps) and that page wouldn’t do whatever I wanted because it said I was anonymous.
The wiki page that Omar Little linked to specifically addresses IP and other personal information:
As Grim Render notes, they don’t have any control over what data the site you go to from one of their links does. Generally speaking, any site can log your IP, they can scan any cookies on your system, they can tell what link brought you to their site, and they can tell what browser you are using (which will often tell them what type of device you are using it on). Your IP also basically gives them your physical location, though it isn’t always all that accurate. IP locators tend to figure out where my home is located is within about 5 to 10 miles, but they often have my work location wrong by 40 or 50 miles.
Private browsing mode (which many different browsers these days have) stops things from being logged on your computer/device, but does not in any way prevent the web site you go to from collecting IP and other information about you.
Just remembered where it was: Youtube. Wouldn’t play a video. Worked fine if I came from Google.
If you really want security in your browsing, then you probably should download a Tor browser and use that. But expect to give up speed in exchange for security.
Can you recommend one?
You get the one for the OS you’re using.
I prefer using a VPN.
I’m assuming one relevant feature of that Tor Browser is the built-in default blocking of various tracking scripts, independent of any VPN layer. I see a slider that starts at “Standard” and has increasingly paranoid settings, eventually blocking most or all JavaScript.
If you just download and use regular Chrome or Firefox, those blockers are not installed by default.
The caveats sound dire. But thanks.
^ I should have just linked to the browser.
A bit of anecdotal “testimonial”
I tried using a tor browser for both my phone and laptop. Both were based on firefox (torfox i believe). I’m a bit paranoid about privacy, but not THAT paranoid. Not a great experience, slow, extremely limited options on just about everything and omg slooooooooowwwww.
I love setting it so the “You are using an Ad Blocker” pop ups come up in German.
DDG + VPN is a pretty good combo for confusing the trackers.