Here's why:
* Redundancy: "Best" already implies the highest quality or level, so "possible" can be redundant.
* Better alternatives: There are often more concise and elegant ways to express the same meaning:
* "The optimal solution"
* "The most effective way"
* "The highest quality product"
Here's an example:
* Awkward: "We need to find the best possible solution to this problem."
* Improved: "We need to find the optimal solution to this problem."
However, there are situations where "best possible" can be appropriate, especially when emphasizing the need for a very high standard:
* "We're doing everything we can to get you the best possible service."
* "We strive to provide our customers with the best possible experience."
In these examples, "best possible" helps to emphasize the dedication to achieving a high standard.
Ultimately, the best choice depends on the specific context and the desired tone.