What is the correct command to redirect a search for 'xxx' in Google to another website?

The command that successfully redirects a search for 'xxx' in Google to another website is found in the first option. By using the command /ip proxy access add dst-host=*xxx* action=deny redirect-to=www.mikrotik.com, you are specifying that any access attempts directed at a destination host matching the pattern 'xxx' will be denied. However, the critical part of redirecting is that you are also directing those denied requests to an alternate site, in this case, www.mikrotik.com.

When configuring such a proxy rule, it's essential to use the correct action. Using an action like "deny" in this context not only prevents the original site from being reached but also allows for redirection to a different website. The configuration ensures that users who attempt to search for 'xxx' will not access their intended site but instead be redirected to the specified alternative.

The other options either allow access while attempting redirection, which doesn't meet the requirement of search redirection, or incorrectly employ actions that would not lead to an effective redirect in the context given. Thus, the first command effectively combines the ability to deny access while redirecting users to a specified alternate site.