A website like NZHerald.co.nz is updated every day, and Google knows this, so it indexes it every day. That means new content will show up on the search engine results pages on a daily basis – a must if your product is time-sensitive like NZ Herald’s!
However, if Google returns to your website after a month or two and finds that it hasn’t been updated, it may choose not to return for another 3 months. If it finds your website has still not been updated in this time, it might not return for another 6 months, and so on.
Regular updates mean search engines will schedule in regular crawls of your website, which will mean your new content is shown in the search engine results faster, and can start winning you new visitors more quickly.