Create content and use tactics that help to keep them connected with your brand, even when they are not actively engaging with it. One of the most effective ways to boosts engagement is through Newsletters. This will keep them up-to-date about your latest products and discounts, major sales that they shouldn’t miss or any changes you make with regards to the terms & conditions of your service.
According to this research by McKinsey, a customer narrows down their options based on the initial consideration (brand awareness) and active evaluation (seek information about the products/services). When both of the former factors are in place, it leads to a purchase decision a.k.a sales, albeit just for that moment. This then needs to continue towards the next stages in the sales funnel, .i.e. customer engagement and customer loyalty.