Contact Form 7
Forms are one of the most essentials of your website. Each website requires a contact page. Without it, one could be missing out on all kinds of business opportunities and connections, regardless of customer or the website owner! I have no idea why WordPress didn't include a simple Contact Form in its core. This is a must-have feature because, without a Form, a Website is not complete I guess.
WordPress has a vast number of contact form plugins available, and these can be used to create everything from simple feedback forms to complex order forms and questionnaires, but I think Contact Form 7 is the most well-known WordPress forms plugin with around 5+ million active installations on websites globally. When it comes to implementing contact forms to a WordPress site, Contact Form 7 is recommended for its ease of use and simplicity.