How to vertically center multiple columns in a row., HTML/CSS

Simply I use a combination of flexbox and alignment properties.

Here's how you can do it:

Create a row element and add the display: flex; property to it. This will make the row a flex container.

<div class="row"> 
    <div class="column">
        Column 1
    </div> 
    <div class="column">
        Column 2
    </div> 
    <div class="column">
        Column 3
    </div> 
</div>

Add the align-items: center; property to the row element. This will vertically center the columns within the row.
```
.row { 
    display: flex; 
    align-items: center; 
}
```
Style the columns as needed. You can set the width and height of the columns, add padding or margins, and style the text or images inside the columns.
```
.column { 
    width: 33.33%; 
    height: 200px; 
    padding: 20px; 
    text-align: center; 
    font-size: 24px; 
}
```
In this example, the columns have a width of one-third of the row's width and a fixed height of 200 pixels. They also have padding, centered text, and a font size of 24 pixels.
Test the layout to ensure that the columns are vertically centered within the row.
Retest on a mobile device as the viewport change can make the webpage look bad on a smaller screen.

By using flexbox and alignment properties, you can easily vertically center multiple columns in a row in HTML and CSS.