A trailer introduces the main characters of the film and gives the audience a complete picture of what to expect. As it plays a major role in building up hype around the flick, the makers give a lot of importance to their film trailers.

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In 2015, more than 250 Tamil movie trailers were released on YouTube. Among the huge lot, it is Ilayathalapathy Vijay's "Puli", which got highest number of hits on the video-sharing website. Below, we bring to you the top 10 most-viewed Tamil trailers of the year:

Ranking 1: Puli
Total Hits: 8,086,632
Published on:  19 August, 2015
Second Trailer Hits: 4,287,452
"Puli" had big names in the cast like Kannada superstar Sudeep, yesteryear sensational actress Sridevi Kapoor along with leading actresses Shruthi Haasan and Hansika Motwani. It was a fantasy-adventure movie written and directed by Chimbu Deven.

Ranking 2: Vedalam
Total Hits: 6,153,276
Published on:  7 October, 2015
"Vedalam" starred Ajith, Shruthi Haasan and Lakshmi Menon. It was sibling-sentiment movie written and directed by Siruthai Siva.

Ranking 3: Maari
Total Hits: 5,478,423
Published on: 25 June, 2015
Dhanush's "Maari" appears third on the list and has managed to get better hits than a few big-budget movies and films starring A-list actors. It was written and directed by Balaji Mohan.

Top 10 Highest Grossing Tamil Movies in the Year | Biggest Tamil Hits at Chennai Box Office

Ranking 4: O Kadhal Kanmani
Total Hits: 5,111,924
Published on: 28 February, 2015
Mani Ratnam returned to good form with "O Kadhal Kanmani" aka "OK Kanmani". The beautiful romantic flick featured Dulquer Salman and Nithya Menen in the lead roles.

Ranking 5: Masssu
Total Hits: 4,502,347
Published on: 24 April, 2015
Suriya and Nayantara starrer "Masssu" is a supernatural-thriller written and directed by Venkat Prabhu.

Ranking 6: Kaaki Sattai
Total Hits: 3,420,749
Published on: 10 January, 2015
"Kaaki Sattai" is a big ticket movie of Sivakarthikeyan in mass-masala format. The movie, which had Sri Divya in the female lead role, is directed by Durai Senthil Kumar.

Ranking 7: 10 Enradhukulla
Total Hits: 3,394,779
Published on: 30 September, 2015
Vikram and Samantha starrer "10 Enradhukulla" is produced by AR Murugadoss and directed by Vijay Milton. 

Ranking 8: Thoongaa Vanam
Total Hits: 3,063,384
Published on: 16 September, 2015
Kamal Haasan, Trisha Krishnan and Prakash Raj starrer Thoongaa Vanam is a crime-thriller directed by Rajesh M Selva.

Ranking 9: Vaalu
Total Hits: 1,884,794
Published on: 27 June, 2015
Simbu and Hansika Motwani's "Vaalu" is a romantic-comedy film written and directed by Vijaychander.

Ranking 10: Thani Oruvan
Total Hits: 1,540,766
Published on: 16 August, 2015
Jayam Ravi and Arvind Swamy starrer action-thriller is directed by Mohan Raja.