Clearlake and Siris-backed Newfold Digital, a web technology provider, completed the acquisition of Yoast, a search engine optimization plugin provider. Financial terms were not disclosed. "SEO is a growing need in our customer base and essential to online success, especially as we see more businesses expand their online presence. Yoast is a well-known and respected brand in the WordPress community. We are excited to welcome them to the Newfold family and to help improve SEO and drive visitors to our growing customer base," Sharon Rowlands, Newfold Digital President and CEO.