Reading List will save interesting articles found on Safari for later reading.
From the home screen, tap Safari.
Browse to the desired article and tap the Share icon.
Tap Add to Reading List.
The article has been added to Reading List. It will be available when your iPhone is connected to Internet but also when in Offline mode.
To access the Reading List, tap the Bookmarks icon.
Tap the Reading List tab.
Tap an article.
The Reading List article is now displayed.