StackFlex is a new kind of copy-paste.
Now, think that you got a problem and Google it. You found a solution. What do you do? You Copy-Paste it! But, imagine you get the same problem again. But you can't find the solution. That's what StackFlex is for. You save the code and use it from VsCode. Everything is synced.
Save snippet from the browser
Use saved snippets inside VSCode