In my opinion heading tag can be implement in the page for targeting keyword.The main heading implement in H1tag. Then the sub heading is using H2 tag.And H1 is each pages.
Heading tags( <H1>....</H1>) are used to display headings ranging from H1 to H6. <H1> defines the most important heading while <H6> defines the least important heading. Search engines use your headings to index the structure and content of your web pages.
Here’s how you create heading tags http://www.w3schools.com/TAGS/tag_hn.asp