Generally the browsed information will be saved on the server, so for security reasons, you can manually go to delete the browsing history after the query. Click on the Settings option in the upper right corner of the search interface, find History and you will see the keywords you have searched before, check the ones you want to delete.

If you're searching on a cell phone, you can find the content in the search drop-down box.

The concept of "big data" is a particularly large volume, data categories of data sets, as long as the keywords are entered will be collected by big data.