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As others had answered before, if the pages with parameters are just a consequence of a filter, but don't actually add nothing relevant (aka: substantially duplicated of the not parametered URLs) or nothing all, than the best idea is having those URLs with noindex meta robots. This will ensure that those pages, if they were crawled, will disappear from the index. But this is just a general rule, because can exists many variations to that same rule (and we don't know how really has been developed your site). For instance, if those pages cannot be physically crawl because the filters are behind a Javascript selector (something that can be verified disabling Java in the browser), then you should not suffer issues and, eventually, using the meta robots "noindex" should be just a prevention not really an intervention to something already happened.

Hi, If you would deem all internal pages to be of equal importance, then yes, there is no harm in this. The homepage is always set at 1.0 though. That said, everyone always has a view of their internal pages and which they class as pass-though to get to something more important, so do keep this in mind when deciding. -Andy

Hi Asif That page is being indexed https://www.google.co.uk/?gws_rd=cr&ei=rpEdU6OzHcOUhQfkjIDwAQ#q=http%3A%2F%2Fwww.mycity4kids.com%2FDelhi-NCR%2Fsearch%2Fguitar-classes It's just not ranking that well. Probably worth trying to obtain relevant, high quality links to that page. Also, does appear to have a lot of keyword stuffing (guitar classes appears over 20 times on the page). The listings could probably benefit from short descriptions rather than key phrase based tags.