Shared ground
Psalm 120:1 is a brief personal report: the speaker was in real distress, cried out to Yahweh, and says Yahweh answered. Those points are explicit in the verse (distress → cry → answer). The line assumes that bringing trouble to God in prayer is appropriate and meaningful, not pointless.
The verse also functions as an opening “headline” for the psalm: it introduces a situation of pressure before any details are given. In the larger psalm, the distress is explained further as conflict connected to harmful speech (vv. 2–4), but verse 1 itself stays general.
Where interpretation differs (only where needed)
Two main questions are left open by the verse.
First, what kind of distress is in view. Some read it mainly as distress caused by slander and hostile speech, because the next lines focus there. Others treat it as a more flexible, “portable” statement that can fit many kinds of danger or constraint, with the later verses giving one concrete example.
Second, what “He answered me” means. Some take it to imply a clear outward deliverance (a change in circumstances). Others think the answer could include guidance, protection, or inner steadiness without immediate external change.
Why the disagreement exists
The verse is intentionally short and does not specify the threat or the form of the answer. Readers therefore infer details from (a) the rest of Psalm 120, and (b) broader patterns in the Psalms where “answer” can describe different kinds of divine response.
What this passage clearly contributes
It provides a simple cause-and-result testimony: distress leads to a cry directed to Yahweh, and the speaker claims Yahweh responded. It sets the tone for Psalm 120 as a prayer that begins from pressure rather than comfort, and it frames what follows as grounded in an experienced relationship with God, not abstract ideas about prayer.