Usefull plugins

Performance

• https://wp-rocket.me/
• https://www.wpfastestcache.com/
• https://optimole.com/

Security

• https://updraftplus.com/
• https://ithemes.com/security/
• https://sucuri.net/
• https://www.wordfence.com/

Shop

• https://woocommerce.com/

Forms

• https://www.gravityforms.com/
• https://ninjaforms.com/

GDPR

• https://de.borlabs.io/

Translation

• https://translatepress.com/
• https://wpml.org/
• https://polylang.pro/
• https://localise.biz/wordpress/plugin

SEO

• https://yoast.com/
• https://www.monsterinsights.com/

Lightbox

• WP Featherlight