The Front of Your Liset
The Codex
The Codex is an area on your ship that is located at the top left of the ramp across from the Market. The Codex is an in-game database where you can search for information and view different quests you have completed. You can also go to Universe > Relics & Arcanes and use the search tool to find which relics contain the different Prime parts you are looking for. Clicking on the relics will give you more information on what they contain. The Codex contains knowledge on what mods you have/have not obtained, as well as items/enemies you have/haven't scanned. All of your tutorials are under the training section if you need to go back at any point.
The Market
The Market is where you can purchase Warframes, weapons, cosmetics, sentinels and more items that are prebuilt. However, you can buy blueprints for some of the items. Some items can only be found in clan dojos.
Conclave
Conclave is Warframe's PVP area. It has four different game modes.
Annihilation - You are alone against many. Annihilate the most Oro to win the match.
Team Annihilation 4v4 - Annihilate th e Oro of the opposing team to win victory.
Cephalon Capture 4v4 - Capture the opposing Cephalon while protecting your own.
Lunaro 3v3 - Ancient team sport of the lost Orokin era. (Similar to Rocket league, but without cars!)
Annihilation - You are alone against many. Annihilate the most Oro to win the match.
Team Annihilation 4v4 - Annihilate th e Oro of the opposing team to win victory.
Cephalon Capture 4v4 - Capture the opposing Cephalon while protecting your own.
Lunaro 3v3 - Ancient team sport of the lost Orokin era. (Similar to Rocket league, but without cars!)