Smith Collection/Gado/Getty ImagesPubMatic conducted a layoff last week as part of a plan to focus on growth areas.The layoff affected a dozen employees, or around 1% of staff.PubMatic said it plans to increase its overall head count by 15% despite recent challenges.PubMatic, the publicly listed adtech company, last week conducted a layoff as it looks to reorient its business toward growth areas like connected-TV advertising, according to four people familiar with the matter.