Channel Limit limits the number of impressions delivered on a Channel (for particular placement/ad unit) to a unique user.
When the Channel Limit is reached, ZEDO will deliver Default ads, if uploaded, or blanks (FOCs). You can see it in the Channel – Ad Dimension section of Create/Edit Channel.
The maximum Channel Limit is 101. By default, Channel Limits is set to 102, which the system reads as “unlimited”.