The following functions can be used on the category.php template to display information about the current category.
Display Current Category Title on category.php:
<?php single_cat_title(); ?>
<?php single_term_title(); // more generic - can be used on archive.php too ?>
Display Current Category Description:
<?php echo category_description(); ?>
Get Current Category Object:
<?php $this_cat = get_queried_object(); ?>
Use Category Object returned above to get ACF fields on category:
<?php the_field( 'category_landing_page_hero_image', $this_cat ); ?>
Display Category Link – works for custom taxonomies and post categories.
<?php echo get_category_link( $category_id ); ?>