Step 3: Opt for the appropriate announcement format.
Select the format you’ll use to recruit beta users, keeping the nature and impact of the feature in mind. Consider modal windows, tooltips, slideouts, emails, or dedicated in-app pages.
Use modal windows and dedicated in-app pages for significant features that bring substantial changes or value.
Use tooltips, slideouts, and checklists for minor updates or improvements. For example, Etsy announces its beta feature using a tooltip.