Izito and similar sites keeps appearing in my search results


Izito and similar sites keep appearing on my search engine results. It started a few weeks ago. It has been happening on both – my Ubuntu and Windows computer, and even on a new Windows computer. It has been happening on Chrome and Microsoft Edge and on Google and Bing. I have since installed Bitdefender AV and done factory resets and it still keeps coming back after a while. I was wondering if someone could please advise on what might be causing it, what damage / impact it might (have) caused, and how I could get rid of it.