guusifs

This plugin is intended to make on site SEO very simple, not necessarily easy. The basic idea is to add the meta description tag to your pages and posts.
Next to adding the meta description tag it also has the option to override the default title of your post and/or display clean titles without the site name.
More information about the background of the plugin in the IFS SEO Simple main screen. Just download and install. The plugin won’t change anything before you configure it, so you can install it safely. You will only see some additional fields in the edit screen, but if left empty they don’t do anything.

Plugin Name: IFS Seo Simple

Purpose of this plugin is to make on site search engine optimization simple.

Farhad Sakhaei

ParsMizban

DediData

This plugin optimizes WordPress for better ranking in Google and other Search Engines 
* Add post excerpt as Meta Description
Validated by: 
https://wpreadme.com 
https://wordpress.org/plugins/developers/readme-validator

Smart SEO

Smart SEO - WordPress Search Engine Optimization Tools

Plugin Name: IFS Seo Simple vs Smart SEO