Home - HubSpot Marketing Software - Fill in the blank: Strive to choose a core topic with a monthly search volume that’s at least __________. Fill in the blank: Strive to choose a core topic with a monthly search volume that’s at least __________. 2shares Facebook Twitter Pinterest LinkedIn Skype Facebook MessengerQuestion: Fill in the blank: Strive to choose a core topic with a monthly search volume that’s at least __________. 20 300 800 1,500 The right answer was: 300