What is the first step involved in developing and implementing a social media marketing campaign?
determine the budget
identify goals and strategy
review existing data
identify the target audience

The first and foremost step is the determine the budget and also to identify the goals and the strategy.

Explanation:

In order to develop and implement or execute the social media marketing campaign or plan one need to follow the following six essential or vital steps:

Step 1: Decide or Determine the Objective and Budget

Step 2: Identify or recognize the Target Audience

Step 3: Create the Message

Step 4: Develop or spread the Media Strategy

Step 5: Implement or execute the Marketing Campaign

Step 6: Last step is to measure and analyze the Results or outcomes

Therefore, the first step is to decide the goals and the budget.

answer; measurable outcome;