If your bike has STI or Ergo levers, and you'll be shifting while pedaling out of the saddle, you should not use that chain.

If you can locate the compromised link and replace it with a Powerlink, all is well.

For seated riding, you might still be able to dislodge one end of the sideplate while shifting under power, so it is possible that the link could then fail completely when you were pedaling steadily out of the saddle.

Having the chain fail while standing can cause an abrupt change in the bike's direction. Very, very bad if it fails during a sprint.
It is also not uncommon for a failing chain sideplate to snag solidly on the front derailer cage.

Re-assembling a modern chain's links with the pushed-out pin or pins reduces the sideplate's retention quite drastically.

Go back and try pushing the re-installed pin back out with the chain tool and you'll immediately see what I mean here.