WooCommerce: Add Continue Shopping Button on Cart Page

gistfile1.php

<?php

/**
* Add Continue Shopping Button on Cart Page
* Add to theme functions.php file or Code Snippets plugin
*/

add_action( 'woocommerce_before_cart_table', 'woo_add_continue_shopping_button_to_cart' );

function woo_add_continue_shopping_button_to_cart() {
 $shop_page_url = get_permalink( woocommerce_get_page_id( 'shop' ) );
 
 echo '<div class="woocommerce-message">';
 echo ' <a href="'.$shop_page_url.'" class="button">Continue Shopping →</a> Would you like some more goods?';
 echo '</div>';
}

Thanks ! Still good in 2021.
I'm no coder, but tweaked this slightly - plain button underneath cart, plus 'message' button above checkout.

/**
* Add Continue Shopping Button on Cart (& checkout) Page
*/

add_action( 'woocommerce_after_cart_table', 'woo_add_continue_shopping_button_to_cart' );

function woo_add_continue_shopping_button_to_cart() {
 $shop_page_url = get_permalink( woocommerce_get_page_id( 'shop' ) );
 
 echo '<div class="">';
 echo ' <a href="'.$shop_page_url.'" class="button">Continue Shopping</a>';
 echo '</div>';
}

add_action( 'woocommerce_before_checkout_form', 'woo_add_continue_shopping_button_to_checkout' );

function woo_add_continue_shopping_button_to_checkout() {
 $shop_page_url = get_permalink( wc_get_page_id( 'shop' ) );
 
 echo '<div class="woocommerce-message">';
 echo ' <a href="'.$shop_page_url.'" class="button">Continue Shopping</a> Not finished shopping ?';
 echo '</div>';
}

Thank you for the code @bradleysa and the update @photoMaldives

I went ahead and adjusted based on a bunch of various resources.

// Add continue shopping button to Single product page, Cart page and Checkout page.

/* Single product
https://www.businessbloomer.com/woocommerce-continue-shopping-button-single-product-page/
https://www.businessbloomer.com/woocommerce-visual-hook-guide-single-product-page/ */

add_action( 'woocommerce_after_add_to_cart_button', 'continue_shopping_button_to_single_product' );
function continue_shopping_button_to_single_product() {
 $shop_page_url = get_permalink( woocommerce_get_page_id( 'shop' ) );
 echo ' <a class="continue button" href="'.$shop_page_url.'">Continue Shopping</a>';

}

/* Cart
https://wpbeaches.com/add-continue-shopping-button-woo-commerce-cart-page/
https://www.tychesoftwares.com/woocommerce-cart-page-hooks-visual-guide-with-code-examples/ */

add_action( 'woocommerce_cart_actions', 'continue_shopping_button_to_cart' );
function continue_shopping_button_to_cart() {
 $shop_page_url = get_permalink( woocommerce_get_page_id( 'shop' ) );
 echo ' <a class="continue button" href="'.$shop_page_url.'">Continue Shopping</a>';

}

/* Checkout
https://www.businessbloomer.com/woocommerce-visual-hook-guide-checkout-page/ 
https://gist.github.com/bradleysa/7d1448253097784daf94 */

add_action( 'woocommerce_review_order_before_submit', 'continue_shopping_button_to_checkout' );
function continue_shopping_button_to_checkout() {
 $shop_page_url = get_permalink( wc_get_page_id( 'shop' ) );
echo ' <a class="continue button" href="'.$shop_page_url.'">Continue Shopping</a>';

}

CSS class continue button:

a.button.continue {
	background-color: var(--wp--preset--color--primary) !important;
	padding: 0.8rem 1rem !important;
        border: 2px solid #ebe9eb !important;
        margin: 0;
	color: #fff !important;
}

I noticed I had to add in the !important tag on most of the code to get it to work.
I am tested with the theme Twenty Twenty Two.

Let me know of any adjustments that would be helpful to do.

Thanks ! Still good in 2021. I'm no coder, but tweaked this slightly - plain button underneath cart, plus 'message' button above checkout.

/**
* Add Continue Shopping Button on Cart (& checkout) Page
*/

add_action( 'woocommerce_after_cart_table', 'woo_add_continue_shopping_button_to_cart' );

function woo_add_continue_shopping_button_to_cart() {
 $shop_page_url = get_permalink( woocommerce_get_page_id( 'shop' ) );
 
 echo '<div class="">';
 echo ' <a href="'.$shop_page_url.'" class="button">Continue Shopping</a>';
 echo '</div>';
}

add_action( 'woocommerce_before_checkout_form', 'woo_add_continue_shopping_button_to_checkout' );

function woo_add_continue_shopping_button_to_checkout() {
 $shop_page_url = get_permalink( wc_get_page_id( 'shop' ) );
 
 echo '<div class="woocommerce-message">';
 echo ' <a href="'.$shop_page_url.'" class="button">Continue Shopping</a> Not finished shopping ?';
 echo '</div>';
}

Everything I've tried from this thread works but I was wondering how to keep the button on the cart page the same way but have "continue shopping" show in the "have a coupon click here to enter your code" button instead of below it like the code above has it?

Awesome!!!!