How do you update 1,000 pages per day

Hi to all, how do you update 1,000 pages per day, manuallly take a very long time so..... Because search engines love when you update often or very often more than 1 time per day so......

And when you update pages what's the best to put

1- new content on the top of the page
2- new content where you want search engine find it.

thanks enjoy your day