Product Grid Page

<?php
/**
 * Template Name: Product Grid Page
 *
 */

get_header(); ?>

    <div id="primary" class="site-content">
        <div id="content" role="main">

            <?php $args = array(
                'posts_per_page' => 6,
                'category_name' => 'products',
                'paged' => get_query_var('paged')
                );
                $product_posts = new WP_Query( $args );
            if( $product_posts->have_posts() ) :
            while ( $product_posts->have_posts() ) : $product_posts->the_post(); ?>

            <div class="product grid">
                <?php the_post_thumbnail('thumbnail');//add here what you want to output per post/product// ?>

            </div><!-- .product -->

            <?php endwhile; // end of the loop.
            endif; wp_reset_postdata(); ?>

        </div><!-- #content -->
    </div><!-- #primary -->

<?php get_footer(); ?>