did you try a simple googling about this with your question statement? i bet you would find plenty of information about this and many more related stuff!! give it a try
The same way you have added the href attribute to the anchor tag, You can add the target attribute. You need to give the target attribute a value. In this challenge that value is _blank. Yes it should be preceded with _ . Let me know if it helps.
If you want to write code, Write the code in between `` or select the </> and write the code. The browser renders the code you have written. So, it will be hidden.