Even the FBI says you should use an ad blocker
In a pre-holiday public service announcement, the FBI said that cybercriminals are buying ads to impersonate legitimate brands, like cryptocurrency exchanges. Ads are often placed at the top of search results but with “minimum distinction” between the ads and the search results which can look identical to the brands that the cybercriminals are impersonating. Malicious ads are also used to trick victims into installing malware disguised as genuine apps, which can steal passwords and deploy file-encrypting ransomware.
One of the FBI’s recommendations for consumers is to install an ad blocker. By blocking ads, would-be victims are not shown any ads at all, making it easier to find and access the websites of legitimate brands. Ad blockers are also good for privacy, because they prevent the tracking code within ads from loading.
Source: Even the FBI says you should use an ad blocker | TechCrunch