If it was an app, it was probably Facebook. But no, no one searched for "Tektronix". It's not a company I use nor one I have EVER searched for. My co-worker told someone on the phone "It's a fluke..." and I piped up, "No, it's a Tektronix!" (geek humor, both Fluke and Tektronix make test equipment)

THE NEXT DAY I got ads for, you guessed it...Tektronix. That wasn't random, and that wasn't me searching for it. That was my phone listening to my conversations and picking up a keyword, then feeding me ads in chrome.