This is a brilliant tool that I have been hoping Google would develop for a while now – I wrote about this area in relation to website widths previously.

Currently the data is based on a portion of visitors to Google.com – which is probably the best overall data we could have, however the type of business you are in or your geographic location could impact significantly on the overall data.

Therefore, while the information Browser Size makes available is incredibly useful, with any luck Browser Size will be added to Google Analytics, so that you could compare your own site’s traffic to benchmarking data, which would make it invaluable.

The data is intended to be used for laying out your site in terms of width and depth so that the elements that need high visibility are above the fold for the highest percentage of visitors.

Read the Google blog post on Browser Size to understand more about how the tool can help you with placement of elements on your site to increase conversion.

For example, on the download page for Google Earth, the install rate increased by 10% when we moved the “Download” button 100 pixels upward.