use relevant hashtags only. you need to prefix '#' to your text. But you should not do that for every single word. use popular and relevant hashtags

Steps to use hashtags:
Don't string too many words together with a single hashtag.
If you tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your tweet.
Don't #spam #with #hashtags. Don't over-tag a single tweet.
Use hashtags only on tweets relevant to the topic.

The hashtag's widespread use began with Twitter but has extended to other social media platforms.The Hashtags turn topics and phrases into clickable links in your posts on your personal Timeline or Page.

Steps to use hashtags:
Don't string too many words together with a single hashtag.
If you tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your tweet.
Don't #spam #with #hashtags. Don't over-tag a single tweet.
Use hashtags only on tweets relevant to the topic.

hastags is actualy important for, instagram, twitter, pinterest, google+. For facebook and tumblr it is not effective like that. Beucase hastags important in facebook if you are use facebook ads. otherwise not effective.

Steps to use hashtags:
Don't string too many words together with a single hashtag.
If you tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your tweet.
Don't #spam #with #hashtags. Don't over-tag a single tweet.
Use hashtags only on tweets relevant to the topic.

Steps to use hashtags:
Don't string too many words together with a single hashtag.
If you tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your tweet.
Don't #spam #with #hashtags. Don't over-tag a single tweet.
Use hashtags only on tweets relevant to the topic.

Hastag using the highlight keywords and using the social networking sites.

Insert Hashtags with most frequent searchable words.

Don't string too many words together with a single hashtag.

Don't string too many words together with a single hashtag.
If you tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your tweet.
Don't #spam #with #hashtags. Don't over-tag a single tweet.
Use hashtags only on tweets relevant to the topic.

Aman has explained very well :)

many words together with a single hashtag.

While hashtags are expanding in popularity and use throughout social media, I feel that Twitter is their natural habitat. Most of the advice above was written with Twitter in mind, but let’s dig a little deeper.

you have to use hashtag before starting to your keyword it will give more + points