Portfolio (Shared) Bid Strategy

Creates, updates, lists and assigns PORTFOLIO (shared) bidding strategies — Google Ads' Shared library → Bid strategies. This is the ONLY way to put a max/min CPC limit on Maximize Conversions, Maximize Conversion Value, Target CPA or Target ROAS: those strategies carry cpc_bid_ceiling/floor ONLY as a portfolio strategy, never on the campaign itself (which is why manage_bidding_strategies rejects max_cpc for them). action: • list: every portfolio strategy on the account with its limits and how many campaigns use it (read-only, no confirm needed). `limit` affects only one response page; use `page_token=next_page_token` for the cached remainder without a new query or credit. • create — makes a new portfolio strategy. name + strategy required. max_cpc = CPC ceiling, min_cpc = optional CPC floor, target_cpa / target_roas optional targets. • create_and_assign — create, then attach it to campaign_id in one step (the usual request: "cap Maximize Conversions at 50 TL on this campaign"). • assign — attach an EXISTING strategy (bidding_strategy_id, from action=list) to campaign_id. This replaces the campaign's own bidding settings. • update — change the NAME and/or the limits/targets of an existing strategy (bidding_strategy_id): pass name to rename it, max_cpc / min_cpc / target_cpa / target_roas to change its limits. Affects EVERY campaign using it. The strategy TYPE cannot be changed — create a new strategy for that. • delete — removes a strategy from the Shared library (bidding_strategy_id). Refused while any active campaign still uses it; it removes strategies attached to nothing. strategy: MAXIMIZE_CONVERSIONS | MAXIMIZE_CONVERSION_VALUE | TARGET_CPA | TARGET_ROAS | MAXIMIZE_CLICKS | TARGET_IMPRESSION_SHARE. Amounts are in the account currency (max_cpc=50 → 50 TL/click ceiling). To move a campaign back to its own (non-shared) bidding, call manage_bidding_strategies — it detaches the portfolio automatically. confirm=false → dry-run preview.