Installing and Configuring Zen-Cart
The minimum to change here are HEADER_SALES_TEXT, which defines the 'tag line', and HEADER_ALT_TEXT, which defines the alt text for the logo header. This file is also where you specify the filename and dimensions of the logo image, which must be changed to match any custom logo.
The includes/languages/ENGLISH/meta_tags.php file contains constants for configuring page elements which are used by some search engines. This includes the page title, which is set by both the TITLE constant, and the SITE_TAGLINE constant. If you use a site icon (favicon) and it is not in the default place, you can specify the location and filename in the FAVICON constant in this file.