EmbedCopy the following HTML iframe code to your website:<iframe src="https://www.validify.ai/glossary/opt-in-single-double/?embed=1&length=X" style="width:100%;height:300px;border:solid 1px black;" class="cm-embedded-content"></iframe>Copy to clipboardConsent models: single opt-in adds a subscriber after one action; double opt-in requires a follow-up confirmation step (typically link click).
