is a cuebid directly after an opening ("direct cuebid") and shows a TWO suited hand.

If the opening is 1 or 1 (a minor), then a cuebid of that minor shows BOTH MAJORS.

If the opening is 1 or 1 (a major), then a cuebid of that major shows the OTHER MAJOR and a minor.

Often expected is 5 cards in each suit.

Depending on vulnerability, you might decide that 5 of one and 4 of the other is sufficient.
With a very weak hand, you may decide that 6 of one and 5 of the other is best.
Designing responses to cope with possible 6:4 shape may be your style.
Discuss it with your partner.

Mini-max Michael's Cuebid limits use of the convention to hands with less than ~12 or more than ~15.

Hands in between that range (12-15) would overcall the higher suit and possibly later bid the other suit.

Examples:

Opener	Michael's Bidder
1	2

AK432 AK432 Ax x
K5432 65432 xx x
Both hands qualify as Michael's Cuebids, not vulnerable.
Cuebid of a minor shows both major suits.

Opener	Michael's Bidder
1	2

AK432 Ax AK432 x
K5432 x xx 65432
Both hands qualify as Michael's Cuebids, not vulnerable.
Cuebid of a MAJOR shows the OTHER MAJOR and a minor
The cuebidder's partner bids 2N to ask "which minor?". The cuebidder then bids that minor if there's no interference. With a very strong hand, perhaps even then.

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	2	Pass	2N(asks)
Pass	3

The Cuebidder has shown spades and clubs.
With a strong 15+ hand, 3 risks a pass while 4 risks playing without a fit at an even higher level.
You may wish to widen the range for the Michael's Cuebid of a Major envisioning a subsequent 4 of a minor response.

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	1	1N	Pass
2	2

AK432 A5432 x x
K5432 A5432 KQx -
Both hands overcall 1 because they're neither >15, nor <12.
The 2 rebid does not guarantee a 5th heart.

Opponent's Preempts:

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	2	Pass	2N
3	X

A JTxxx K AKQ986
This cuebidder has chosen to show hearts and a minor instead of simply overcalling 2 and later bidding the higher ranking heart suit (reversing).
The 2N tends to deny 3 hearts.
Does 2N promises at least 3 cards in each minor?
Is the double for penalty?

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	2	Pass	2N
3	4/Pass

With a mini-Michael's (weak hand), passing 3 is advisable.
Should 4 promise a 6th club as well as a strong hand, or a particularly strong hand (20+) that didn't have spades for defence?

Offshape/Overcall

Opener	Michael's Bidder
1	1/2

QT9432 J5432 A x
This hand may be a tough choice.
There is an extra spade that argues for a 1 overcall, while the weakness of the hand and heart fit possibly missed otherwise suggests otherwise.

Cuebidder's Partner Bids a Suit Cuebidder Doesn't Have:

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	2	Pass	3*

*AKQ x Axxx xxxxx
3 3 JT98 AKQT987
3 3 AT98 JT98765
QT94 QT94 Axxx A
QT94 QT94 xxxx A

Which of these hands does 3 show?

Cuebidder's Partner Bids a Suit Cuebidder Might Have:

Opener	Michael's Bidder	Opener's Partner	Michael's Partner
1	2	Pass	3*

Maybe the cuebidder has diamonds.
Does 3 promise clubs and deny both diamonds/spades?
Is it to play?
Is it lead directing with both minors?
Is it a game try opposite a maximum minimum (i.e. 10-11) ?

Which of these hands does 3 show?
What would 3 show?