Google will truncate your title tag after ~67 chars. Try to keep your title under 67 chars.
The meta description will be limited to 156 chars.

This module will help you edit the title and description for SEO purposes.

Displays the character count for the meta title and meta description input fields
for the product page, category page and information page in the admin area for SEO purposes.

PLEASE RATE, LIKE OR +1 IF THIS EXTENSION HELPED YOU.

Requirements:
OpenCart 2.0 or higher
vQmod 2.5.0 or higher

Support:
office@youonline.ro
http://www.youonline.ro