By default, you will see “You May Also Like” as Heading Text for suggestion post under your single post page.
Add this code into your theme functions ( Appearance > Editor > functions.php )
Parameter *
<pre>
Line #21
echo ‘<h3 class=“related-post-title“>’ . esc_html__( ‘You May Also Like’, ‘dahztheme’ ) . ‘</h3>’;
</pre>
Replace text with your liking.