Ahh. New Squad activities?

1st Division, Command
This division is the head of Gotei 13 and the ones responsible for relaying Central 46 orders, dealing with Soul Society law and monitoring the other divisions.
The captain of the 1st Division is also the head of all other captains and the leader of Gotei 13, given the rank of General Commander.
Likewise, the 1st Division vice-captain is leader of the vice-captains and has authority over all vice-captains, next to their own captains and the General Commander.
This division has the least number of shinigami.

2nd Division, Special Forces / Assassination & Undercover Operations
The captain of the 2nd Division is also captain of the Special Forces; one of Soul Society’s two other military fractions except for the Gotei 13.
Members of the 2nd Division are mainly dealing with stealth and assassination, and many of them are also members of the Special Forces as well. They also handle all undercover operations regarding Seireitei security.
Special Forces applicants take additional two-year training after Shinigami Academy.

3rd Division, Intelligence & Information
The 3rd Division is the unit that are responsible of the act of sending out shinigami to gather information, and sometimes work in cooperation with 2nd Division agents on more serious missions. They are also the ones that sort all outgoing and incoming information before sending them to the 12th Division for storage.
Adding to this, they are in charge of the jigokuchou monitoring and message system.

4th Division, Medical Assistance & Supply
The 4th Division deals with the brunt of the healing when it comes to shinigami or other spiritual entities. While the shinigami in this division use medicines for their healing, they do have the ability to use their energies for curative purposes, something unique to those that are in or have been in the 4th Division, because the average shinigami can only use their power for combat.
This unit is assigned many of the menial tasks in the Soul Society, such as cleaning the subterranean canals located under the Seireitei. Additionally, this particular division is considered the lowest in the Gotei 13 hierarchy, albeit the fact that they heal almost all the injured in the Soul Society.
4th Division members are taken from the Shinigami Academy at their third year, after proving exceptional, non-violent reiatsu, and then takes an additional study of four years to become medics.

5th Division, Kidou Corps / Kidou Tactics & Control
The captain of the 5th Division is also captain of the Kidou Corps; one of Soul Society’s two other military fractions except for the Gotei 13.
Members of the 5th are in general kidou experts, and are often stationed together with 11th Division members, 2nd Division assassins as well as 4th Division healers to form an all-around military group. They are also responsible for all sealing and magical workings inside Soul Society, as well as recording and storing any new kidou.
Members of the Kidou Corps are handpicked from the best kidou-users of the shinigami, and undergo additional training.

6th Division, Internal Affairs/Seireitei Defense
The 6th Division handles all of Gotei 13’s internal affairs, such as monitoring shinigami activity and handling any disturbances from other shinigami. They are responsible for apprehending shinigami that breaks Soul Society laws and also detaining them until Central 46 has given their verdict in the matter.
Their division has the most holding cells, which is used to detain criminal offenders until they are judged.
The 8th Division is the ones that actually send out patrols on a daily, frequent basis to survey Seireitei. If a threat occurs, they find and take care of it, sometimes with help from other divisions. They also work together with various divisions.
If a threat is a large enough, the 8th Division is in charge of sending out shinigami, assembling them, assigning them duties, and other things.

7th Division, Seireitei-Rukongai Diplomacy
The 7th Division maintains peace between Seireitei and Rukongai. They make sure shinigami don’t go causing chaos in Seireitei, and are completely responsible for keeping Rukongai civil… or at least the area closest to Seireitei.
When souls have complaints/suggestions/questions/etc, whatever, they send is sent to the 7th Division where it is read, ignored, taken into consideration, and decided upon.
They often act on their own, but also work with various other divisions.