In text or online conversations, "ig" commonly stands for "I guess."

Explanation:

• It's often used to express uncertainty or a tentative agreement.
• Example:
  Person A: "Do you want to go to the movies?"
  Person B: "Ig, sure."

Other possible meanings:

• Instagram (especially when referring to the social media platform)
  Example: "Check my post on ig."

But in general texting or casual chat, "ig" usually means "I guess."