(Reuters) -Photoshop maker Adobe will acquire software platform Semrush in a $1.9 ​billion deal, the companies said on Wednesday. Adobe ‌will pay $12 per share for the company, representing a premium ‌of around 77.5% to Semrush's closing price on Tuesday. Semrush shares jumped 55% in premarket trading. Semrush designs and develops software that helps companies with search ⁠engine optimization, ‌social media and digital advertising. The potential acquisition would allow Adobe, which offers tools such ‍as ...