Links with the attribute target="_blank" require the rel="noopener noreferrer" attribute to avoid being penalized.

[charity]

Some time ago, it was very common to include referral links anywhere and for anything, but that created saturation and made Google become stricter.

A while back, Google limited the reach of links displayed with

target="_blank"

It turns out that adding rel="noopener noreferrer" and leaving it

... target="_blank" rel="noopener noreferrer" ...

is considered a cleaner practice, although I am still figuring out what exactly that rule implies and whether one should include rel="noopener noreferrer" in links even if they are not meant to be opened in another tab. I don't know what you all know or think about this...