There are lots of plugins available in wordpress. You can select the plugin as per the needs of your project. Compared to other CMS like drupal, the wordpress lacks some essential functionality in the core. To overcome this difficulty we have to use contributed plugins available. Here are the 5 plugins that will be needed in all kinds of wordpress projects.
1. Yoast SEO
SEO will play a key role in the success of every website. Yoast SEO provides all functionalities related to SEO. The free version of this plugin is enough for most of the functionalities. If you have advanced requirements, you can try the paid version.
2. WP-Optimize
Wp Optimize provides cache features for your wordpress project. It is using a lot of good techniques to improve your site performance. There are other plugins like Wp Rocket available for caching. But in my experience WP Optimize is the best cache plugin available in wordpress.
3. Meta Box
Creating custom meta fields with wordpress is a tedious job. The meta box plugin will overcome these difficulties. This plugin can be used as an API for custom field development. No doubt this plugin can be extensible and do a lot more than expected.
4. Contact Form 7
The contact form plugin gives an interface to build contact forms. It is easy to use and customize. It will work along with other plugins to achieve goals.
5. Wordfence security
Like other open source, wordpress is also not away from hackers attacks. Wordfence plugin provides security to your wordpress with different tools. It provides login security, malware scanner, email reports, firewall protection etc.