Marketing Strategy Brainstorm

I am launching a [Specify Product/Service, e.g., new mobile app for local hikers] and my target audience is [Specify Audience, e.g., millennials aged 25-40 who are active outdoors]. Brainstorm a multi-channel marketing strategy for the first three months post-launch. Suggest 2-3 specific and creative ideas for each of the following channels: 1) Social Media Marketing (specify platforms). 2) Content Marketing. 3) Community Engagement/Partnerships.