Google experiments with new sitelinks layouts and visual styling in mobile search results
TLDR
Google is testing alternative sitelinks designs in mobile search results, including a vertical list format with a left-side accent line.
Optimixed Overview
Optimixed's original report on this story.
SERoundtable reports that Google is experimenting with new visual layouts for sitelinks in mobile search results, with at least one variant displaying links in a vertical line-by-line format accented by a horizontal line on the left side of the snippet. The exact scope and eventual rollout of these design tests remain unclear.