Will it boost the ranking for site in search engine if we use Microdata?

Answer 1

The answer is neither yes nor no, it's a bit more complicated.

The usage of microdata itself won't result in boosting your ranking just because it's microdata. However, if Google can understand your content better, users searching for your product, event or pieces of information will get more precise results, and if your content is the anwer for their questions, you will achieve a better place in the list of results.

see Google's blog entry on microdata:
googlewebmastercentral.blogspot.com/2010/03/microdata-support-for-rich-snippets.html

Answer 2

No.  Microdata/Microformats do not have any effect on SEO, just how the system displays the data to the searcher.

Answer 3

Similar to Sitemaps.xml (http://www.sitemaps.org/), its helps the search engines to better classify your data and display results. Which will inturn boost your site traffic.

Comments

Do you have a source showing/stating that Microdata affects how a search engine classifies your site or places in the results?

Answer 4

Matt Cutts from Google has an answer to this, over in  http://www.youtube.com/watch?v=OolDzztYwtQ

Transcription (thanks to http://www.webpronews.com/matt-cutts-on-schema-org-markup-as-a-ranking-signal-2012-10 )

“On one hand, I wouldn’t necessarily count on that….Just because you implement schema.org doesn’t mean you necessarily rank higher. But there are some corner cases like if you were to type in ‘lasagna,’ and then click over on the left-hand side and click on ‘recipes,’ that’s the sort of thing where using schema.org markup might help, because then you’re more likely to be showing up in that at all. So there are some cases where it can be helpful to use schema.org markup.”

“I wouldn’t necessarily count on that giving you any sort of ranking boost…I’m not going to take it off the table, but for example, it might make sense in some of those specific topic areas, but just because somebody implements schema.org markup, that doesn’t mean that they’re necessarily and automatically a better site, so I wouldn’t count on that giving you a good ranking boost, although it can be a good idea to markup things in a rich structure just because, you know, then different people can slice and dice and find your site more easily if they are doing more digging.”

(this btw should count for both schema.org in Microdata, and schema.org in RDFa Lite)