The poster indicates the degree of difficulty of the hike. To understand how to interpret the degree of difficulty of the hike, one needs to know that:
Difficulty T = Tourist. It includes routes on small roads, mule tracks and convenient well-marked paths that pose no uncertainties, difficulties or problems of orientation. These are routes suitable even for hikers with first experience in the mountains.
Difficulty E = Hiking. Routes that are on trails or tracks, generally marked, also long, with some exposed sections, but well protected or secured with handrail ropes. These are routes that already require a minimum of experience and training.
Difficulty EE = Experienced Hikers. Characterizes those generally marked routes that imply an ability to move easily over even impervious and/or treacherous terrain, short scree, open slopes with no landmarks, rocky sections with slight technical difficulties, general mountain experience and knowledge of the alpine environment, sure-footedness, absence of vertigo and adequate physical preparation.