After selecting your keywords, you need to decide how to bid on them. Depending on your goals, budget, and preferences, you can use manual bidding, automated bidding, or smart bidding. Manual bidding requires more time and effort, but it gives you more control and flexibility. Automated bidding saves time and hassle, but reduces control and visibility. Smart bidding uses machine learning and AI to optimize bids based on data signals, which can improve performance and efficiency. You can also choose from different bidding methods such as CPC (pay per click), CPA (pay per action), or CPM (pay per thousand impressions). CPC is suitable for campaigns that aim to drive traffic or engagement; CPA is suitable for campaigns that aim to drive conversions or revenue; and CPM is suitable for campaigns that aim to increase brand awareness or reach.