Yes.
If you configured only text for Ad label (for example Advertisement) then the following code will be added above ad code:
<div class="code-block-label">Advertisement</div>
You can define style for labels (assuming block class name is code-block)
<style type="text/css">
.code-block-label {
font-size: 12px;
}
</style>
You can put this style code into your theme’s style.css file or in the Header section:
https://adinserter.pro/documentation#header-footer
However, instead of only text you can also define HTML code for Ad label, for example:
<div style="font-size: 12px;">Advertisement</div>
