<main>
   <section>
     <div class="testimonial">
       <div class="container">
        <div class="testimonial__inner">
          <div class="testimonial-slider">
            <div class="testimonial-slide">
              <div class="testimonial_box">
                <div class="testimonial_box-inner">
                  <div class="testimonial_box-top">
                    <div class="testimonial_box-icon">
                      <i class="fas fa-quote-right"></i>
                    </div>
                    <div class="testimonial_box-text">
                      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Delectus optio facilis beatae.</p>
                    </div>
                    <div class="testimonial_box-shape"></div>
                  </div>
                  <div class="testimonial_box-bottom">
                    <div class="testimonial_box-profile">
                      <div class="testimonial_box-img">
                        <img src="https://i.ibb.co/hKgs8gm/profile.jpg" alt="profile">
                      </div>
                      <div class="testimonial_box-info">
                       <div class="testimonial_box-name">
                         <h4>John Doe</h4>
                      </div>
                      <div class="testimonial_box-job">
                        <p>MANAGER</p>
                      </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="testimonial-slide">
              <div class="testimonial_box">
                <div class="testimonial_box-inner">
                  <div class="testimonial_box-top">
                    <div class="testimonial_box-icon">
                      <i class="fas fa-quote-right"></i>
                    </div>
                    <div class="testimonial_box-text">
                      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Delectus optio facilis beatae.</p>
                    </div>
                    <div class="testimonial_box-shape"></div>
                  </div>
                  <div class="testimonial_box-bottom">
                    <div class="testimonial_box-profile">
                      <div class="testimonial_box-img">
                        <img src="https://i.ibb.co/JQ18QKW/asd.jpg" alt="profile">
                      </div>
                      <div class="testimonial_box-info">
                       <div class="testimonial_box-name">
                         <h4>John Doe</h4>
                      </div>
                      <div class="testimonial_box-job">
                        <p>CEO</p>
                      </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="testimonial-slide">
              <div class="testimonial_box">
                <div class="testimonial_box-inner">
                  <div class="testimonial_box-top">
                    <div class="testimonial_box-icon">
                      <i class="fas fa-quote-right"></i>
                    </div>
                    <div class="testimonial_box-text">
                      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Delectus optio facilis beatae.</p>
                    </div>
                    <div class="testimonial_box-shape"></div>
                  </div>
                  <div class="testimonial_box-bottom">
                    <div class="testimonial_box-profile">
                      <div class="testimonial_box-img">
                        <img src="https://i.ibb.co/hKgs8gm/profile.jpg" alt="profile">
                      </div>
                      <div class="testimonial_box-info">
                       <div class="testimonial_box-name">
                         <h4>John Doe</h4>
                      </div>
                      <div class="testimonial_box-job">
                        <p>MANAGER</p>
                      </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="testimonial-slide">
              <div class="testimonial_box">
                <div class="testimonial_box-inner">
                  <div class="testimonial_box-top">
                    <div class="testimonial_box-icon">
                      <i class="fas fa-quote-right"></i>
                    </div>
                    <div class="testimonial_box-text">
                      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Delectus optio facilis beatae.</p>
                    </div>
                    <div class="testimonial_box-shape"></div>
                  </div>
                  <div class="testimonial_box-bottom">
                    <div class="testimonial_box-profile">
                      <div class="testimonial_box-img">
                        <img src="https://i.ibb.co/JQ18QKW/asd.jpg" alt="profile">
                      </div>
                      <div class="testimonial_box-info">
                       <div class="testimonial_box-name">
                         <h4>John Doe</h4>
                      </div>
                      <div class="testimonial_box-job">
                        <p>CEO</p>
                      </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
       </div>
     </div>
   </section>
 </main>

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
  }
  
.testimonial{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #14213d;
    color: #14213d;

    &-slide{
        padding:20px;
    }
    &_box{   

        &-top{
            background-color: #e5e5e5;
            padding: 30px;
            border-radius: 15px;
            display: flex;
            position: relative;
            box-shadow: 5px 5px 20px rgba(229, 229, 229, 0.301);
        }
        &-icon{
            margin-top: -12px;
            padding-right: 20px;
            i{
                font-size: 25px;
                color: #14213d;
            }
        }
        &-text{
            p{
                color: #707070;
                font-size: 14px;
                line-height: 20px;
                margin-bottom: 0;
            }
        }
        &-shape{
            position: absolute;
            bottom: -10px;
            left: 50px;
            width: 20px;
            height: 20px;
            background-color: #e5e5e5;
            -webkit-transform: rotateZ(50deg);
            transform: rotateZ(45deg);
        }

        &-bottom{
            padding-top: 35px;
            padding-left: 25px;
        }
        &-profile{
            display: flex;
        }
        &-img{
            display: flex;
            justify-content: center;
            img{
                width: 70px;
                height: 70px;
                border-radius: 50px;
                border: 2px solid #e5e5e5;
            }
        }
        &-info{
            display: flex;
            justify-content: center;
            flex-direction: column;
            padding-left: 20px;
        }
        &-name{
            h4{
                font-size: 20px;
                line-height: 25px;
                color: #e5e5e5;
                margin-bottom: 0;
            }
        }
        &-job{
            p{
                color: #e5e5e5;
                font-size: 14px;
                text-transform: uppercase;
                letter-spacing: 3px;
                line-height: 20px;
                font-weight: 300;
                margin-bottom: 0;
            }
        }
    }
}
  .slick-dots li button:before{
    font-size: 15px;
    color: #e5e5e5;
  }
View Compiled
$(document).ready(function() {
        $('.testimonial-slider').slick({
            autoplay: false,
            autoplaySpeed: 1000,
            speed: 600,
            draggable: false,
            infinite: true,
            slidesToShow: 3,
            slidesToScroll: 1,
            arrows: true,
            dots: true,
            responsive: [
                {
                  breakpoint: 991,
                  settings: {
                    slidesToShow: 2,
                    slidesToScroll: 1,
                  }
                },
                {
                    breakpoint: 575,
                    settings: {
                      slidesToShow: 1,
                      slidesToScroll: 1,
                    }
                }
            ]
        });
    }); 

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css
  2. https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css
  3. https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick-theme.css
  4. https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js
  2. https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.bundle.min.js
  3. https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js
  4. https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.js