Keyword Restrictions
You can use as much keywords as you want. At a minimum you will only need one keyword to create a campaign, no maximum limitation on this.
For Instagram, at a maximum, campaigns are only limited to one keyword.
*Tip: Your data collection will be highly dependent on the number of keywords you use and the filter type chosen. Be sure you use the correct filter type and keyword in order to collect data that will help you achieve your goals. :)