Sometime we don’t want the target of a link to be alerted to the existence of our page. There used to be ways to remove the referer header as it is optional, but browsers will likely give it away anyway. Now there are new ways to see the referring site without the header.
The safest way is to use an anonymizer site.
noref.io is one service. Just add a # after the / and then the url you want to send to, e.g: https://noref.io/#https://clickforcharity.net
The redirection is fast enough to be invisible to the user.
anonym.es has a script to convert all links to use it. There is even a field to exclude any keywords or domains. For single links, use as noref.io above but substitute ? for #.