Second Choice Edit Meaning

1.

It isn't what you want the most. But you can live with it if you don't get your first choice.

You can also get second choiced by something you want. Then the decision is out of your hand. They have the power to choose.

Jane got ranked for her job interview. That means she didn't get offered the job. Instead the employers will hire her if the first person doesn't take the job. Jane is their second choice, a fall back option

See second, choice, runner up