In this video we are going to learn about Query String.
The query string is the part that comes after the URL path and starts with a question mark ('?')
Let's see how to get the query string properties and their values.
Go to the index.js file and create a route.

app.get('/user',(req,res)=>{ 
    var name = req.query.name; 
    var age = req.query.age; 
    res.send('Name:'+name + 'Age:'+age); 
}); 

Now lets check.
So go to command prompt and run index.js file.

node index.js

Now switch to browser and go to the url /user and here enter the query string ?name=jenifer&age=25.
You can see here the name and age.
So in this way you can retrieve query string property.