Hello Readers!

If you want to redirect users after adding a specific product to their cart. Below is the example, just pasted this code into into your themes functions.php file

<?php

    add_filter( 'woocommerce_add_to_cart_redirect', 'redirect_add_to_cart' );
    function redirect_add_to_cart() {

     //Get product ID
     if ( isset( $_POST['add-to-cart'] ) ) {

      $product_id = (int) apply_filters( 'woocommerce_add_to_cart_product_id', $_POST['add-to-cart'] );

      //Check's the product ID is in the proper taxonomy and return the URL to the redirect product
      if ( has_term( 'posters', 'product_cat', $product_id ) )
       return get_permalink( 10 );

     }

    }

    ?>

In above example, the code will get the id of the product added to the cart and checks if the product is in the correct product category of woocommerce. and at the end it will gets the permalink of redirected product abd returns it to the add_to_cart_redirect filter. Gets the permalink of the redirect product and returns it to the WooCommerce add_to_cart_redirect filter.