Title: Thai baht
Content:  The baht (บาท, ; sign: ฿; code: THB) is the official currency of Thailand. It is divided into 100 satang (สตางค์, ). The issuance of currency is the responsibility of the Bank of Thailand. According to Bloomberg, the Thai baht was the world's best performing currency in 2018. The SWIFT, as of January 2019, ranked the Thai baht as the 10th most frequently used world payment currency.
Title: List of motifs on banknotes
Content:  The official currency of Thailand is the Thai Baht (THB). The motifs used are:
Title: Economy of Thailand
Content:  The economy of Thailand is dependent on exports, which accounted in 2019 for about sixty per cent of the country's gross domestic product (GDP). Thailand itself is a newly industrialized country, with a GDP of 16.316 trillion baht (US$505 billion) in 2018, the 8th largest economy of Asia, according to the World Bank. As of 2018, Thailand has an average inflation of 1.06% and an account surplus of 7.5% of the country's GDP. The Thai economy was expected to post 3.8% growth in 2019. Its currency, the Thai Baht, ranked as the tenth most frequently used world payment currency in 2017. 
Title: Customs law of Thailand
Content: Local currency (Baht/THB): up to 50 000 Baht per person or 100 000 Baht per family. However, in the case of export Thai currency to countries such as Laos, Myanmar, Cambodia, Malaysia and Vietnam its amount may not exceed 500 000 Baht. ; Foreign currencies: unlimited. But sums, that exceed in the equivalent of 20 000 US dollars, must be declared at customs. There are allowed to export the following sums of cash:
Title: History of Thai money
Content:  The history of Thai money used as a medium of exchange and to settle accounts before the adoption of Thai baht coins and banknotes include novel designs and forms. For Thai people, money was considered as the symbol of civilization. Currency itself reflected faith in religion, culture, the customs and traditions of each era and also serve as a record of the development of Thailand.
Title: Economy of Thailand
Content:  In 2016, tourism revenue, 2.53 trillion baht, accounted for 17.7 percent of Thailand's GDP, up from 16.7 percent in 2015. It is expected to generate 2.71 trillion baht in 2017. The global average for GDP contribution from tourism is nine percent. Cryptocurrencies Thailand's Ministry of Finance approved four licensed brokers and dealers of cryptocurrencies in the country: Bx, Bitkub, Coins and Satang Pro. The country still did not elaborated regulation for ICOs, though it announced in late 2018 to loosen the rules.
Title: Customs law of Thailand
Content: The local currency (Baht/THB): up to 50 000 Baht per person or 100 000 Baht per family. ; Foreign currency: unlimited. But sums, that exceed in the equivalent of 20 000 US dollars, must be declared at customs. There are allowed to enter the following sums by cash:
Title: Thai baht
Content:  Cowrie shells from the Mekong River had been used as currency for small amounts since the Sukhothai period. Before 1860, Thailand did not produce coins using modern methods. Instead, a so-called "bullet" coinage was used, consisting of bars of metal, thicker in the middle, bent round to form a complete circle on which identifying marks were stamped. Denominations issued included 1⁄128, 1⁄64, 1⁄32, 1⁄16, 1⁄8, 1⁄2, 1, 1 1⁄2, 2, 2 1⁄2, 4, 4 1⁄2, 8, 10, 20, 40, and 80 baht in silver and 1⁄32, 1⁄16, 1⁄8, 1⁄2, 1, 1 1⁄2, 2, and 4 baht in gold. One gold baht was generally worth 16 silver 
Title: Five-baht coin
Content:  The Thailand five-baht coin is a denomination coin of the Thai baht, the Thai currency unit. Like all coins in Thailand, its obverse features King of Thailand, Vajiralongkorn Bodindradebayavarangkun, and previously Bhumibol Adulyadej.
Title: Twenty-five-satang coin
Content:  The Thailand twenty-five-satang coin is a currency unit equivalent to one-fourth of a Thai baht. It is commonly called salueng (สลึง) by Thai speakers. Salueng is the name of a historical Thai measurement, equal to one quarter of a baht or 3.75 g.

Question: what type of currency do they use in thailand?
Answer: Thai baht.