Create a PMPro [membership-level] shortcode to display the user's current membership level.

pmpro-membership-level-shortcode.php

<?php // Do not copy this tag.
/**
 * Use the shortcode [membership-level] to display the user's current membership level.
 *
 * Copy the function below into your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

/**
 * pmpro_membership_level_shortcode Function to create the new [membership-level] shortcode
 *
 * @return string       Returns the string created by the $your_membership_level variable.
 */
function pmpro_membership_level_shortcode() {
	global $current_user;
	$your_membership_level = '';
	if ( is_user_logged_in() && function_exists( 'pmpro_hasMembershipLevel' ) && pmpro_hasMembershipLevel() ) {
		$current_user->membership_level = pmpro_getMembershipLevelForUser( $current_user->ID );
		$your_membership_level = sprintf( __( 'Your current level is: %s', 'paid-memberships-pro' ), $current_user->membership_level->name );
	} else {
		$your_membership_level = __( 'You do not have a level', 'paid-memberships-pro' );
	}
	return $your_membership_level;
}
add_shortcode( 'membership-level', 'pmpro_membership_level_shortcode' );