By Sean Poulter PUBLISHED: 16:40 EST, 8 May 2013 | UPDATED: 01:39 EST, 9 May 2013 Sainsbury's is giving away 20million vouchers a month in a bid to overtake Asda as the UK¿s second biggest supermarket They've wooed us with buy one get one free offers, value ranges and loyalty card reward points. Now supermarkets are tapping into the growing trend among families for using coupons at the tills to get us through the doors – and beat rival chains in the supermarket wars. Sainsbury’s is giving away 20million vouchers a month in a bid to overtake Asda as the UK’s second biggest supermarket.
@highlight
Sainsbury’s giving away 20million vouchers a month
@highlight
It is in a bid to overtake Asda as the UK’s second biggest supermarket
@highlight
Strategy has helped group to increase its sales faster than biggest rivals
Grocery sales online were close to £1billion, while @placeholder’s Local convenience stores took £1.5billion.