Microsoft Ultimate Word Games

The Expert title is unlocked by reaching level 80 in Jumble. Everything you do in Jumble awards you experience: daily challenges, adventure map levels, and quickplay games. Experience is awarded per star earned. Difficulty (such as later adventure levels or quickplay difficulty) does not impact experience earned, although daily challenge difficulty does. However, completing an Expert Jumble daily challenge still rewards you less experience than getting all three stars on an easy Jumble quickplay game.

It is for that reason that the fastest way to level up in Jumble is to play quickplay games on easy difficulty. Naturally you should save this achievement for after you've done everything else related to Jumble to minimize how much experience grinding you need to do. Once you're done with everything else, the fastest way to grind experience is in quickplay.

Load up a quickplay session on easy difficulty. As with all other Jumble achievements, you can feel free to use an anagram solver to finish each quickplay game, but in my opinion it takes longer to switch back and forth and type in all the words from the anagram solver than it does to just solve it yourself. Many of the puzzles are 4- or 5-letter words with only 6-15 total words to find anyway, and you should be pretty used to words that show up at this point, so I found it way faster to just hammer out all the words myself, then if you get stuck, you can check the anagram solver. It's also worth mentioning that if you're playing on a tablet, using your keyboard will make this much faster, assuming you're a fast typer. Having to tap all the letters with your finger is way slower than typing them all out with a keyboard.

One other thing to consider is upgrading to Premium. For $2, you get double experience for a month. I highly recommend going Premium, as it will make the grind in Jumble, and the other two game modes, only take half the time. In my opinion it is well worth it.

Upon reaching level 80, your title will change to "Jumble Expert" and the achievement will unlock.