如何用CSS实现AdSense广告右侧添加垂直‘Advertisement’标注文本？

First, a critical compliance check: Per AdSense's official policies, only the labels "Advertisements" or "Sponsored Links" are allowed for marking ad units. Stick strictly to these options to avoid policy violations—no custom variants are permitted.

To place a vertical version of this label to the right of your ad, use a combination of HTML wrapping and CSS flexbox + writing modes. Here's a practical, step-by-step solution:

Step 1: Wrap Your Ad and Label in a Container #

Start by wrapping your AdSense ad code and the label element in a parent container. This lets us align them horizontally cleanly:

<div class="adsense-wrapper">
  <!-- Your AdSense ad code goes here -->
  <ins class="adsbygoogle"
       style="display:block"
       data-ad-client="ca-pub-XXXXXXXXXXXXXXXX"
       data-ad-slot="XXXXXXXXXX"
       data-ad-format="auto"
       data-full-width-responsive="true"></ins>
  <span class="ad-label">Advertisements</span>
</div>

Step 2: Style with CSS #

Use flexbox to align the ad and label side by side, then apply writing-mode to make the label vertical:

.adsense-wrapper {
  display: flex;
  align-items: center; /* Vertically centers the label with the ad */
  gap: 10px; /* Adds space between the ad and label */
  width: 100%; /* Ensures the container takes full available width */
}

/* Let the ad occupy all remaining space */
.adsense-wrapper .adsbygoogle {
  flex: 1;
}

.ad-label {
  writing-mode: vertical-lr; /* Makes text vertical, reading top to bottom */
  font-size: 12px; /* Subtle, unobtrusive size */
  color: #666; /* Matches standard ad label styling */
  white-space: nowrap; /* Prevents text from wrapping */
  line-height: 1.3; /* Improves readability of stacked characters */
}

Key Notes & Troubleshooting #

• Alignment Adjustments: If the label doesn’t line up with your ad, tweak the align-items property in .adsense-wrapper—use flex-start for top alignment or flex-end for bottom alignment.
• Fixed-Size Ads: For non-responsive ad units, set the container’s width to match the ad’s fixed dimensions to avoid layout breaks.
• Browser Support: writing-mode works in all modern browsers, so no fallbacks are needed for most user bases.

内容的提问来源于stack exchange，提问作者Robert Stevens