WP Rocket is the best WordPress caching plugin on the market. It allows you to instantly improve your WordPress website speed and performance with no technical skills required.
They monitor and protect your site from DDoS, malware threats, XSS attacks, brute force attacks, spam comment attack, and basically every other type of attack.
OptinMonster is the most popular conversion rate optimization software in the market. It allows you to convert abandoning website visitors into email subscribers and customers.