The type of the task determines which basic effect is resolved, if you succeed (step 8). The number of Impact determines how powerful that basic effect is. 

There are 4 types which have these basic effects:  

• Investigate: Remove 1 Secret for each Impact from the card you interact with. 
• Get Support: Obtain 1 support marker of your choice for each Impact from the card you interact with. 
• Fight: Deal 1 Damage for each Impact to the card you interact with. 
• Hack: Place 1 Hacking Cube for each Impact on the card you interact with. 

When you want to play an Action card, at least 1 action type of the Action card must match the type of the task. The action type Any Task is considered to be always matching.