I wanted some help with site footer. Ideally how many inner links should I have on sitewide footer that would not attract any penalty from Google? I have a travel website and 25 inner links on site wide footer. 20 of these are different sections of website while rest are about us, contact us etc pages. What is the maximum number of inner page links that is acceptable in footer? Should I avoid putting links in footer that already exist on the page in navigation bar and sidebar? Will repeating these links in footer draw penalty?