🙂 That means you can write “whatever” you want.
$mywysisyg oder $text or $kjdnehijd – it is just a variable.
So, if you decide to unse maybe $text please change all “$whatever” in the code above.
<?php
$text = get_field('fieldnameofyourwysisyg');
( !empty( $text ) ): ?>
<div class="yourcontent">
<?php echo $text; ?>
</div>
<?php endif; ?>