"To accelerate the shift" means to speed up or make happen more quickly a transformation or change in a particular direction or towards a specific goal. Full definition
Second, the higher price is a two - edged sword: it makes Australian coal mines temporarily more profitable — but accelerates the shift away from coal in the customer markets. (johnquiggin.com)
Firms can also accelerate a shift in behavior by incorporating efficiency goals into professional development and performance management objectives. (lawvisiongroup.com)
Yes, the coalition wanted to accelerate this shift towards the private sector - but the reforms were not coming completely out of the blue. (politics.co.uk)