Before 2 month ago my new site impression in webmaster 400- 500 but currently my site impression approx 20- 30 so doesn't increase my site impression so tell me whats problem? and How to increase my site impression in Google.?
To increase the impression in google search , your website must have contents which impress google bot. and remember one thing google bot never eats the same food again and again and food must be spicy and in enough quantity . only then google bot will index your recipe in google's directory . so if you do not update your site at regular interval , google bot will stop visiting your site because it do not like to return with empty hands.
It means your site is not showing up much on results, unlike before. It means you are out of ranking now and should work of gaining higher ranks.
Get content that is filled with keywords that Google likes and attract a large amount of traffic. Regular updated content is what is needed and you can't rely on the same content the whole time. Rewrite some of the content of the pages and insert some keywords into prominent places that will really work.
Yes right. now days google gives higher priority to those sites which have quality content. It should be informative and user friendly. If you follow all the guideline provided by google then your website will rank high for your keywords.