STOCKHOLM (Reuters) – UK-based GWI, which surveys consumers to aid advertisers, has raised $180 million from private equity firm Permira at a valuation of $850 million. Founded in 2009, GWI has tripled revenues since raising $40 million in its first funding round from U.S. growth fund Stripes in 2018. “We collect millions of responses to our surveys a year and provide hundreds of millions of data points,” Chief Executive Officer Tom Smith said in an interview, adding a customer like Google could use this data to engage advertisers. GWI is looking to use machine learning and language processing…