What is the use of localStorage in HTML5 ?

Before HTML5 LocalStores was done with cookies. Cookies are not very good for large amounts of data, because they are passed on by every request to  the server, so it was very slow and in-effective. 

In HTML5, the data is NOT passed on by every server request, but used ONLY when asked for. It is possible to  store large amounts of data without affecting the website's performance.and The data is stored in different areas for different websites, and a website can only access data stored by itself.

And for creating localstores just need to  call localStorage object like below we are storing name and address

<script type="text/javascript">
<script type="text/javascript">
         localStorage.address="Mumbai India..";

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