Render Created Custom Options

hi! I’ve been reading a lot about adding custom options, I want to create an additional option to put in a page, like a profile page and by using the codes, I can easily create a page on the admin panel and write down, lets say a short bio, work history etc.

I think I already covered up how to create the additional menu on the admin panel, I just don’t know how to render it on the page. I tried adding <?php echo get_option(); ?> on the page.php (the file I’m editing) but it doesn’t render the one I wrote on the custom option page I made.