Why Cs Cart Support Meta Keyword 256 Char Only

when i uploaded my seo i seen one issue .

in my product i have put 30+ key word , but when is updated cs cart display only 256 char.

why ?

i want to change this setting. how to do that?

Why? Nothing really uses the meta-keywords data anymore because it was so obused. Most search engines rely on content and simply extract keywords from the content of your pages.

If you still want to do it, please run the following query in the phpMyAdmin:

ALTER TABLE  `cscart_product_descriptions` CHANGE  `meta_keywords`  `meta_keywords` VARCHAR(511) NOT NULL DEFAULT  '';