Mark 2:13

‘And he went out again by the sea side, and the whole crowd were resorting to him and he was teaching them.'

Once again Mark draws our attention to Jesus' popularity with the ordinary people. His growing outward success is one of his themes. And he does not fail to draw our attention to the fact that Jesus preaching ministry went on, for this was why He was sent (Mark 1:38). The tenses indicate that the people were constantly coming, and that He was constantly teaching them. It was an ongoing process.

The introduction is general. There is no direct connection with the previous incident, nor the next. The verse is slipped in simply to emphasise what has been said above, that Jesus' popularity with the common people is growing apace.