[Isura]

MJL,

A blocking bet is a smallish bet on the river that is meant to get hero to a cheap showdown and avoid a very tough decision. The assumptions are that villain will not raise this bet with a worst hand (so we can safely fold), and we get paid off by some inferior hands. Also, if the board was draw heavy, but you are unsure if you feel comfortable calling a huge river bet, it might be safer to make a blocking bet, even though many worst hands won't call.