The service, which goes live today and covers funds, Isas, pensions, Sipps, annuities, share dealing and currency, enables consumers to tap into investment and technical research and use interactive tools.
Jacqueline O'Sullivan, UK category marketing manager at Microsoft Advertising, said: "We're delighted to partner with an award-winning investment management service provider and believe that Hargreaves Lansdown can provide invaluable insights to our users.
"In this time of economic uncertainty, consumers are more confused than ever about which financial products are best for them, so it's important for us to ensure they can turn to trustworthy experts."