Twitter announced Tuesday it would double the limit for tweets to 280 characters in a bid to draw in more users and boost engagement at the social network.

“We’re expanding the character limit! We want it to be easier and faster for everyone to express themselves,” tweeted the site, which started testing an increase to its 140-character limit in most languages in early September.
Japan Today

S Twitter
V [announced] (Tuesday)
V [would double]  倍にします
O the limit  制限
[for] tweets ツイート
[to] 280 characters 280文字に

[in] a bid
V [to draw in]   
O more users
V [boost]
O engagement  

[at] the social network. ソーシャルネットワークで

S ”We
V [‘re expanding]  
O the character limit!  文字制限

S We  
V [want]  
O it  
CV [to be]  する方へ
O easier [and] faster  もっと早く より簡単

S [for] everyone 
V [to express]  
O themselves, ”

tweeted the site,  
V  [started]
testing an increase  
[to] its 140-character limit  
[in] most languages  

補 [in] early September.