How to get Woocommerce Top level product categories?

You just need the following arguments in get_terms() function:

$terms = get_terms( array('taxonomy' => 'product_cat', 'parent' => 0) );foreach ( $terms as $term ){    $term_link = get_term_link( $term, $taxonomy );    echo '<a class="ccats" href="'.$term_link.'"><span class="label">'.$term->name.'</span></a>';}

Here are all available arguments that can be used in get_terms() function.

For product category image: Get and display the product category featured image in Woocommerce

You could use like this:

<?php    $taxonomy = 'product_cat';    $orderby = 'title';    $show_count = 0; // 1 for yes, 0 for no    $pad_counts = 0; // 1 for yes, 0 for no    $hierarchical = 1; // 1 for yes, 0 for no    $title = '';    $empty = 1;    $order = 'ASC';    $args = array(        'taxonomy' => $taxonomy,        'orderby' => $orderby,        'show_count' => $show_count,        'pad_counts' => $pad_counts,        'hierarchical' => $hierarchical,        'title_li' => $title,        'hide_empty' => $empty,        'order' => $order,        'parent' => 0    );    $terms = get_categories( $args );    foreach ($terms as $term) { //Cycle through terms, one at a time    // Check and see if the term is a top-level parent. If so, display it.        if($term->category_parent == 0){          $term_id = $term->term_id; //Define the term ID          $term_link = get_term_link( $term, $taxonomy ); //Get the link to the archive page for that term          $term_name = $term->name;          echo '<a class="ccats" href="' . $term_link . '"><span class="label">' . $term_name . '</span></a>';        }     }?>