manornk

META SEO is a plugin that helps you get more visitors through SERPs (Search Engine Results Page). It adds meta description for every post and page, based on their content, but also enables you to add custom meta description on every post, as well as HomePage meta description via META SEO menu. 
Also you can add rel canonical tags on pages and posts.
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META SEO

META SEO is a plugin that helps you get more visitors through SERPs (Search Engine Results Page).

Khanh

Fields is a WordPress plugin that let you manage write panels in your write/edit page. Fields supports post types that can have UIs.
With Fields, you can define boxes which appear in your write panels. A box can contain a number of groups which are sets of custom fields that you can define. Boxes are displayed as meta boxes and groups are shown as tabs that can be switched inside boxes. Within a group, fields can be shown as either textfields, textarea, drop boxes, radio group or check boxes.
Fields does not create custom post types, to do so, use other plugins such as WP Post Type UI.
Brief structure of Fields:
<ul>
<li>Fields can be: textfield, textarea, select (drop box), radio group and check boxes</li>
<li>A group contains fields</li>
<li>A box contains groups</li>
<li>You can choose which groups a box should include and which post types a box should appear in</li>
</ul>

Fields

Creates custom write panels to manage post custom fields.

META SEO vs Fields