To check where a site shortened with bit.ly shortner takes you, follow these steps. 

Bit.ly/The famous url shortner

To check where a bit.ly link takes you, copy the link. Then paste it in the browser but before pressing enter, add + after the link. For e.g a real link is like this:https://bit.ly/3nNDdbl but your link should look like this:https://bit.ly/3nNDdbl+. Done! 

Also check:Where cutt.ly takes you:Click me!