You need to publish a trip where you put everything in detail. your itinerary, how you reach the destination, pictures, budget, number of days. everything. if it gets approved by Tripoto standards, you will be Tripoto approved blogger soon enough
To become an approved blogger, you need to submit few travel stories which later on get published by Tripoto and there after you receive a the HTML link of Tripoto Approved blogger which you can paste in you your blog.