HELP ME PLEASE

I am new comer in this site.I have no enough idea about steemit.I have no enough idea for upvote &comment.Every first night I fell a problem on my account. Then I can not work so it is very sad new for me.You will be clear after see this picture.

mafi001 bandwidth limit exceeded,Please wait to transact or power up STEEM.

I hope you are talent in this case so please help me , what can I do avoid this problem.
I am waiting for your comment,please suggest me......