Infobox

Note: A future level of CSS Shapes will define a shape-inside property, which will define a shape to wrap content within the element.

.note {
  margin: 5vw;
  padding: 0.5em;
  border-left: 0.5em solid #52e052;
  background: #e9fbe9;
}

.note a {
  text-decoration: none;
  color: #161b1e;
}

.note a:hover {
  text-decoration: underline;
}

<p class="note"><a href="https://drafts.csswg.org/css-shapes-2/#propdef-shape-inside" target="_blank">Note: A future
    level of CSS Shapes will define a shape-inside property, which will define a shape to wrap content within the
    element.</a></p>

.ub-notification-text {
    background-color: #d9edf7;
    color: #31708f;
    border-left-color: #31708f;
    text-align: left;
    margin: 10px 0px;
    padding: 15px;
    border-left-width: 4px;
    border-left-style: solid;
}

<div class="ub-notification-text">There is nothing as SEO Trick in world. The Only thing is compliance with a search engine as per the latest SEO trend according to Search Engine Update for eg. Google Panda Update.</div>

.ub-notification-text2 {
    background-color: #dff0d8;
    color: #3c763d;
    border-left-color: #3c763d;
    text-align: left;
    margin: 10px 0px;
    padding: 15px;
    border-left-width: 4px;
    border-left-style: solid;

<div class="ub-notification-text2"><strong>Golden Tip</strong>: Write Content keeping the user in mind and search indent, not for search engines only.</div>

.ub-notification-text3 {
    background-color: #ffd2d2;
    color: #d8000c;
    border-left-color: #d8000c;
    text-align: left;
    margin: 10px 0px;
    padding: 15px;
    border-left-width: 4px;
    border-left-style: solid;
}

<div class="ub-notification-text3"><strong>Mistake:</strong> Never give the conclusion of the article in the meta description</div>