One of Allah's Beautiful Names is Ash-Shakoor: 

The manifestations of Allah's Name Ash-Shakoor (The Most Appreciative) in Ramadan.

Meanings of Ash-Shakoor:

Ash-Shakoor is the exaggerated  form of the adjective   grateful. Man may live in this worldly life for a few years, and if he spends those years in obeying Allah the Almighty, Allah will grant him eternal life. Hence, Ash-Shakoor is the One Who gives great rewards for a few good deeds. Allah the Almighty indicates this fact in the following Hadith Qudsi: 

(I have prepared for my pious worshippers such things as no eye has ever seen, no ear has ever heard of and nobody has ever thought of.)

[Al-Bukhari and Muslim]  

The circles of man's knowledge:

1-    The circle of seen objects:  

Each one of us has a circle to which the seen objects belong. This circle is a bit small. For example, man may visit and see a limited number of countries. 

2-    The circle of heard objects: 

The circle of the seen objects is very small when   compared to the circle of the heard objects. No matter how many countries man may visit, the number is small compared to the number of the countries he heard of even if he has never visited them. 

3-    The circle of thoughts: 

The circle of thoughts is the largest among the  three circles. To make this fact clear, consider the thoughts man can have. For instance, man may think of a mountain that is as high as the distance between the earth and the sun, and he may think that if someone stood on the surface of the earth, he would be close to the moon. Therefore the circle of thoughts is infinite. 

In fact, no matter how huge the circle of thoughts is, Allah's Bestowal goes beyond this circle. 
 Another  meaning  of Ash-Shakoor  has to do with the number of times Allah, Exalted and Sublime be He, rewards you for every good deed you perform even if it seems insignificant. 

(Abu Hurairah narrated: Allah's Messenger, peace be upon him, said: "While a man was walking on a road, he became very thirsty. Then, he came across a well, got down into it, drank (of its water) and then came out. Meanwhile he saw a dog panting and licking mud because of excessive thirst. The man said to himself, 'This dog is suffering from the same state of thirst I did.' So he went down the well (again) and filled his shoe (with water) and held it with his mouth and  gave  the dog water to drink. Allah thanked him for that deed and forgave him." The people asked, "O Allah's Messenger (peace be upon him)! is there a reward for us in serving the animals?" He said, "(Yes) There is a reward for serving any animate (living being).") 

[Al-Bukhari and Muslim]  

Conclusion:

You may do someone a favor, but he does not thank you unless he knows you or he knows that it is you who did him that favor. Allah the Almighty says: 

(Why should Allah punish you if you have thanked (Him) and have believed in Him. And Allah is Evert All-Appreciative (of good), All-Knowing) 

[An-Nisa', 147]

Allah the Almighty knows all your good deeds, and He appreciates them and rewards you for them even if one of these good deeds is saving an ant, calming down a  scared man or feeding a hungry person. Accordingly, everything is recorded and saved to Allah, so He is Aware of the good deeds of someone, and He is Appreciative for them. 

As for man, gratefulness should be one of his good manners since being grateful to other people is their right upon him whether it is verbally or practically. Gratitude cannot be shown verbally and practically unless man knows the blessing he has been granted. Hence, gratitude is based on knowledge.

The manifestations of Ash-Shakoor in Ramadan: 

In the blessed month of Ramadan, the Name Ash-Shakoor is manifested in Allah's Rewards for offering Sawn (fasting) and Taraweeh prayer (this prayer is performed only during the month of Ramadan after Isha' Salat) as He appreciates these deeds by casting tranquility and happiness into your heart, making you very close and intimate to Allah the Almighty. This is manifested greatly on Fitr Eid when man is happy about his achievement   in Ramadan (fasting), just like the way he will be on the Day of Resurrection when he meets with his Lord. The Prophet, peace be upon him, mentioned this fact in the following Hadith narrated by Abi Hurairah: 

(There are two joys for the fasting person: the joy when he breaks his fast and the joy when he meets his Lord) 

[Al-Bukhari, Muslim, Abu Dawood, An-Nasai' and Malik in Mawta']