its pretty self explanatory, the first number is how long your account will bot for (stay logged in), the second number is how long your account will stay logged out for (how long the break will last). After the break ends, your account will log back in (assuming you have entered your login details into the client) and bot for however long your first number is set for, in this case 180minutes, then once again will log out for 30minutes. Randomizing the break will add or subtract a few minutes off of the time, so instead of 180 minutes it might be 170 minutes or 190 minutes, and instead of 30 minutes it might be 20 minutes or 40 minutes.