Hello, i guess you refer to UbidotsMicroESP8266 library.
TLATE i guess stands for translate and sends your request at translate.ubidots.com, port 9012
while the other one sends it at things.ubidots.com, port 80.
TRUE will trigger the first one since "if(type)" is like saying "if(type==true)".
I use false in this one and send my request at things.ubidots.com, i don't really know about the other one.