If this isn't your theme then you will want to create a child theme before editing the footer.php file because the next time you update the theme you will lose all of your file edits.
Your theme looks like it's using Bootstrap CSS, so you can look at that for making CSS edits.
Look at line 37:
"col-md-6" is telling the browser to render your logo and descriptions in a column that spans half the page. You can try changing that line to "col-md-4" and see if your descriptions span the length of the image. The other thing you can do is add a max width size to your footer-logo div or your site-branding-div. Bootstrap has some
sizing helper classes
If you don't want to edit the footer.php file, you can try adding Additional Custom CSS of
Code:
.site-branding-text {
max-width: 200px; /*<------------- adjust 200px until you are happy */
}
You might also need to adjust your logo's width to really get the proper alignment you want.