Softbank-backed Moat has raised $50m in fresh capital to support the development of a standard metric for buying and selling digital adverts.

Moat, the US-based media analytics provider backed by telecommunications firm Softbank, has raised $50m in a series C round led by venture capital firm Insight Venture Partners, the Wall Street Journal reported yesterday.

Founded in 2010, Moat has created technology that can determine whether an online advert can be seen by users.

The company is also buildng a platform that tracks whether a user notices an advert and reacts to it, aiming to make that metric the standard for buying…