Safari on iPhone/iPad is well recognized as one of the best apps in browsing web pages. You can fast browse different web pages, sync Bookmarks on different devices, etc.. through navigation. There is a powerful but unattractive function in Safari -to search for text on web pages. It's really helpful for you to search for keywords among an amount of text, for  example, browsing forum posts.

 
Steps:

1. Go to any website by using Safari.

2. Type keywords you want to search in the search field at the top right of the browser

3. Safari shows the search suggestions related to the keyword without tapping "Search"

4. Select the text or tap "Search", Safari jumps to the search result web page.

5. After finishing search operation, just tap "Finish" button in the left corner.