10 must have WordPress Plugin

1. W3 Total Cache: It is designed to increase the WordPress website page load speed. It helps in improving SEO(Page speed is a important SEO factor) and improve visitors’ overall experience.
2. Akismet: It helps in filtering out any comments on your blog that look like spam.
3. Contact Form 7: Helps in Creating and managing contact forms. No need to having coding knowledge to use Contact Form 7 plugin
4. Disable Comments: The Disable Comments plugin help administrator to  control comments on their site. Comments can be disabled according to post type, on pages, attachments, etc.
5. All In One Schema Rich Snippets: All In One Schema.org Rich Snippets plugin can help search engines to get useful summary of your content to display. These( photos, star ratings, price, author, etc.) useful snippets can help you stand out from your competition.
6. Page Builder by SiteOrigin: Page Builder by SiteOrigin is a drag-and-drop content builder (Page-builder) Plugin. It can be use to Design post and page layouts that were previously not possible to achieve with your current theme.
7. MailChimp for WordPress: It helps you in adding subscription forms in your website and generate subscriber list from site to use in Email marketing.
8. All in One SEO: It is a Good Plugin for Wordpress website SEO. It allows you to add XML Sitemaps, Google Analytics, Google Webmaster, Open Graph data and also makes it easier to make your posts or pages SEO friendly.
9. Updraft Plus WordPress Backup Plugin: UpdraftPlus plugin make backups and restoration very simple. It is most popular backup plugin.It Backup site into multiple cloud storage options like: Dropbox, Google Drive, Amazon S3, UpdraftPlus Vault, Rackspace Cloud, FTP, DreamObjects, Openstack Swift, and email.
10. MetaSlider: MetaSlider pluign allow you to create your own unique SEO-optimized slideshow. It is very easy to create slideshow using MetaSlider, simply select images from your WordPress Media Library, drag and drop them into place, and then set the slide captions, links and SEO fields all from one page.