Use Dynamic data option in the condition dropdown.
{echo:is_404}
== 1
for 404 pages
and
{echo:is_search}
== 1
for search result pages.
References:
Use Dynamic data option in the condition dropdown.
{echo:is_404}
== 1
for 404 pages
and
{echo:is_search}
== 1
for search result pages.
References: